1.英語(yǔ)科學(xué)小知識(shí)
1. bat an eye (show surprise, fear, or interest) 眨一下眼睛（表示驚訝、恐懼等）該成語(yǔ)通常用于否定句中，表示不露聲色。
例：Tom told his story without batting an eye, although not a world of it was true.雖然沒(méi)有一句話是真的，湯姆編造故事卻面不改色。2. be all fingers and thumbs做事笨手笨腳例：He could not undo the string of the parcel ---- she was all fingers and thumbs.他怎么也解不開(kāi)包袱上的繩子 ---- 真是笨手笨腳。
3. be born with a silver spoon in one's mouth (born with inherited privilege or wealth) 門(mén)第高貴；出生富豪[注] 銀具是富裕人家身份的象征之一，生在富貴人家的孩子多用銀匙 （silver spoon） 喂食。 例：When does she know about hardship ---- she was born with a silver spoon in her mouth.她根本就不知道什么叫艱難 ---- 他出生在富貴人家。
4. be in sth. up to one's neck (be very much and very seriously involved in) 深陷于。
中例：She said she knew nothing about the robbery, but I'm sure she's in it up to her neck.她說(shuō)她對(duì)這起搶劫案一無(wú)所知，不過(guò)我敢肯定她深深卷入其中。5. bite the hand that feeds one (be very ungrateful) 忘恩負(fù)義；以怨報(bào)德例：She felt that her protégé had bitten the hand that fed him by making unkind remarks about her in public.她覺(jué)得她的被保護(hù)人在公開(kāi)場(chǎng)合講有損她的話是忘恩負(fù)義。
6. bite off sb's nose (scold sb. severely; disagree with sb. in a bad manner) 氣勢(shì)洶洶地回答某人；聲色俱厲地訓(xùn)斥某人[注] 也作snap off sb's head。該成語(yǔ)最早出現(xiàn)于16世紀(jì)。
到了18世紀(jì)，有人用動(dòng)詞 snap 替換該成語(yǔ)中的 bite 一詞。例：She bites off his nose on the faintest provocation.不管有事無(wú)事，她動(dòng)不動(dòng)就聲色俱厲地訓(xùn)斥他。
7. break the back of sth. (complete the heaviest or most difficult part of sth. hurt the most import part) 門(mén)第高貴；出生富豪[注] 銀具是富裕人家身份的象征之一，生在富貴人家的孩子多用銀匙 （silver spoon） 喂食。同義語(yǔ)有be born in （或to） the pruple; be radled in purple.例：Now that you've broken the back of the job, have a rest.你既然已經(jīng)完成了這項(xiàng)工作的主要部分，那就休息一下吧。
8. bury one's head in the sand (deliberately ignore sth. that is obvious but unpleasant) 逃避現(xiàn)實(shí)；拒絕承認(rèn)現(xiàn)實(shí)[注] 鴕鳥(niǎo)遇到危險(xiǎn)時(shí)，總是把頭埋在沙里，自己看不見(jiàn)敵人就認(rèn)為敵人也看不見(jiàn)自己，由此產(chǎn)生這一成語(yǔ)。例：He had suspected for some months that his son was taking drugs, but he had buried his head in the sand and refused to admit it, even to himself.幾個(gè)月來(lái)，他一直懷疑自己的兒子在吸毒，但他卻采取鴕鳥(niǎo)政策，拒絕承認(rèn)現(xiàn)實(shí)。
9. carry a chip on one's shoulder (have rather an aggressive manner, as if always expecting to be insulted, ill-treated) 以挑釁的態(tài)度出現(xiàn)；像要跟人家打架似的[注] 19世紀(jì)中葉美國(guó)中西部的居民尋釁打架時(shí)，常把一塊碎木片（chip）放在肩膀上，誰(shuí)要與他打架就得先擊落這塊木片。例：He is very difficult to deal with ---- he's always carried a chip on his shoulder about his lack of education.他這個(gè)人很難對(duì)付----由于沒(méi)能受到良好的教育，他整天都像要跟人家打架似的。
10. chance one's arm (do sth. risky; take a risk) 冒險(xiǎn)一試；碰碰運(yùn)氣[注] 該成語(yǔ)原出自拳擊運(yùn)動(dòng)，后被裁縫吸收為行話；從1890年起，又被士兵們用來(lái)指“冒降級(jí)的險(xiǎn)”例：The manager decided to chance his arms and try to write a book on economy.這個(gè)經(jīng)理決定碰碰運(yùn)氣，試著寫(xiě)一本關(guān)于經(jīng)濟(jì)的書(shū)。
2.英語(yǔ)科學(xué)小知識(shí)
1. bat an eye (show surprise, fear, or interest) 眨一下眼睛（表示驚訝、恐懼等）該成語(yǔ)通常用于否定句中，表示不露聲色。
例：Tom told his story without batting an eye, although not a world of it was true.雖然沒(méi)有一句話是真的，湯姆編造故事卻面不改色。2. be all fingers and thumbs做事笨手笨腳例：He could not undo the string of the parcel ---- she was all fingers and thumbs.他怎么也解不開(kāi)包袱上的繩子 ---- 真是笨手笨腳。
3. be born with a silver spoon in one's mouth (born with inherited privilege or wealth) 門(mén)第高貴；出生富豪[注] 銀具是富裕人家身份的象征之一，生在富貴人家的孩子多用銀匙 （silver spoon） 喂食。例：When does she know about hardship ---- she was born with a silver spoon in her mouth.她根本就不知道什么叫艱難 ---- 他出生在富貴人家。
4. be in sth. up to one's neck (be very much and very seriously involved in) 深陷于。
中例：She said she knew nothing about the robbery, but I'm sure she's in it up to her neck.她說(shuō)她對(duì)這起搶劫案一無(wú)所知，不過(guò)我敢肯定她深深卷入其中。5. bite the hand that feeds one (be very ungrateful) 忘恩負(fù)義；以怨報(bào)德例：She felt that her protégé had bitten the hand that fed him by making unkind remarks about her in public.她覺(jué)得她的被保護(hù)人在公開(kāi)場(chǎng)合講有損她的話是忘恩負(fù)義。
6. bite off sb's nose (scold sb. severely; disagree with sb. in a bad manner) 氣勢(shì)洶洶地回答某人；聲色俱厲地訓(xùn)斥某人[注] 也作snap off sb's head。該成語(yǔ)最早出現(xiàn)于16世紀(jì)。
到了18世紀(jì)，有人用動(dòng)詞 snap 替換該成語(yǔ)中的 bite 一詞。例：She bites off his nose on the faintest provocation.不管有事無(wú)事，她動(dòng)不動(dòng)就聲色俱厲地訓(xùn)斥他。
7. break the back of sth. (complete the heaviest or most difficult part of sth. hurt the most import part) 門(mén)第高貴；出生富豪[注] 銀具是富裕人家身份的象征之一，生在富貴人家的孩子多用銀匙 （silver spoon） 喂食。同義語(yǔ)有be born in （或to） the pruple; be radled in purple.例：Now that you've broken the back of the job, have a rest.你既然已經(jīng)完成了這項(xiàng)工作的主要部分，那就休息一下吧。
8. bury one's head in the sand (deliberately ignore sth. that is obvious but unpleasant) 逃避現(xiàn)實(shí)；拒絕承認(rèn)現(xiàn)實(shí)[注] 鴕鳥(niǎo)遇到危險(xiǎn)時(shí)，總是把頭埋在沙里，自己看不見(jiàn)敵人就認(rèn)為敵人也看不見(jiàn)自己，由此產(chǎn)生這一成語(yǔ)。例：He had suspected for some months that his son was taking drugs, but he had buried his head in the sand and refused to admit it, even to himself.幾個(gè)月來(lái)，他一直懷疑自己的兒子在吸毒，但他卻采取鴕鳥(niǎo)政策，拒絕承認(rèn)現(xiàn)實(shí)。
9. carry a chip on one's shoulder (have rather an aggressive manner, as if always expecting to be insulted, ill-treated) 以挑釁的態(tài)度出現(xiàn)；像要跟人家打架似的[注] 19世紀(jì)中葉美國(guó)中西部的居民尋釁打架時(shí)，常把一塊碎木片（chip）放在肩膀上，誰(shuí)要與他打架就得先擊落這塊木片。例：He is very difficult to deal with ---- he's always carried a chip on his shoulder about his lack of education.他這個(gè)人很難對(duì)付----由于沒(méi)能受到良好的教育，他整天都像要跟人家打架似的。
10. chance one's arm (do sth. risky; take a risk) 冒險(xiǎn)一試；碰碰運(yùn)氣[注] 該成語(yǔ)原出自拳擊運(yùn)動(dòng)，后被裁縫吸收為行話；從1890年起，又被士兵們用來(lái)指“冒降級(jí)的險(xiǎn)”例：The manager decided to chance his arms and try to write a book on economy.這個(gè)經(jīng)理決定碰碰運(yùn)氣，試著寫(xiě)一本關(guān)于經(jīng)濟(jì)的書(shū)。
3.科學(xué)知識(shí)英語(yǔ)作文200字帶翻譯
As we all know that the popularizing rate of the scientific knowledge for Americas isn't high,so is the chinese.In fact,the popularizing rate of a country is very important for it is related with the development and progress of the country.
Duo to China once was a feudal state owning more than two thousand years' history,some superstition still exists in many people's mind.In order to raise the popularizing rate of scientific knowledge,we should follow the prescribed order.
Firstly,we can open up some courses about the scientific knowledge in the kingdergatens,primary schools and middle school.Besides,some scientific knowledge can be introduced to the young through the form of cartoons to raise their interests.
Secondly,some activities with award about the scientific knowledge can be held in cities and countryside to raise the scientific knowledge of the middle and old aged people.
Therefore,let's try our best to learn more about the scientific knowledge to make a difference both for ourselves and our motherland.
希望能幫上你?。?/p>
4.英語(yǔ)科普小知識(shí),急
要想學(xué)好英語(yǔ)不止才有這幾個(gè)方面，還要掌握一些重要的知識(shí)。
例如：英語(yǔ)中的“八大時(shí)態(tài)”?！鞍舜髸r(shí)態(tài)”分別有：一般將來(lái)時(shí)，一般現(xiàn)在時(shí)，一般過(guò)去時(shí)，現(xiàn)在進(jìn)行時(shí)，現(xiàn)在完成時(shí)，過(guò)去將來(lái)時(shí)，過(guò)去完成時(shí)和過(guò)去進(jìn)行時(shí)。
當(dāng)然英語(yǔ)的“八大時(shí)態(tài)”也很重要，它也是學(xué)好英語(yǔ)的最基本。以下是“八大時(shí)態(tài)”的簡(jiǎn)介。
一、一般時(shí)態(tài) 1、一般現(xiàn)在時(shí) （1）一般現(xiàn)在時(shí)表示沒(méi)有時(shí)限的持久存在的動(dòng)作或狀態(tài)或現(xiàn)階段反復(fù)發(fā)生的動(dòng)作或狀態(tài)，常和副詞 usually,often,always sometimes, regularly,near,occasionally,every year, every week 等連用。 （2）在由after,until,before,once,when,even if,in case,as long as,as soon as,the moment 以及 if,unless 等引導(dǎo)的時(shí)間狀語(yǔ)從句或條件狀語(yǔ)從句中，通常用一般現(xiàn)在時(shí)代替將來(lái)時(shí)。
（3）某些表示起始的動(dòng)詞，可用一般現(xiàn)在時(shí)表示按規(guī)定、計(jì)劃或安排要發(fā)生的動(dòng)作，這類動(dòng)詞有：be,go,come,start,depart,arrive,begin,leave 等。（4）在由why,what,where,whoever,who,that,as 等引導(dǎo)的從句中，也常用一般現(xiàn)在時(shí)代替將來(lái)時(shí)2.一般過(guò)去時(shí) （1）表示過(guò)去某一特定時(shí)間所發(fā)生的、可完成的動(dòng)作或狀態(tài)，常與表示確切過(guò)去時(shí)間的詞、短語(yǔ)或從句連用。
（2）表示過(guò)去習(xí)慣性動(dòng)作。（注意與be used to doing短語(yǔ)的區(qū)別） 3.一般將來(lái)時(shí) 1）表示將來(lái)打算進(jìn)行或期待發(fā)生的動(dòng)作或狀態(tài)。
2）幾種替代形式： 1)be going to +v在口語(yǔ)中廣泛使用，表示準(zhǔn)備做或?qū)l(fā)生的事情2)be to +v表示計(jì)劃安排要做的事，具有“必要”的強(qiáng)制性意義。3)be about to +v表示即將發(fā)生的事情。
4)be due to +v表示預(yù)先確定了的事， 必定發(fā)生的事。5)be on the point/verge of +v – ing 強(qiáng)調(diào)即將發(fā)生的某種事態(tài)。
. 二、進(jìn)行時(shí)態(tài) 1.現(xiàn)在進(jìn)行時(shí) （1）表示現(xiàn)在正在進(jìn)行的動(dòng)作，常與now,right now,at the mother,for the time being,for the present等連用。（2）表示現(xiàn)階段經(jīng)常發(fā)生的動(dòng)作， 常與always,continually,forever,constantly等連用。
（3）表示根據(jù)計(jì)劃或安排在最近要進(jìn)行的事情。具有這種語(yǔ)法功能的動(dòng)詞僅限于過(guò)渡性動(dòng)詞。
即表示從一個(gè)狀態(tài)或位置轉(zhuǎn)移到另一個(gè)狀態(tài)或位置上去的動(dòng)詞。常用的有：go,come,leave,start,arrive,return等。
（4）有些動(dòng)詞不能用進(jìn)行時(shí)，這是一類表示“感覺(jué)，感情，存在，從屬”等的動(dòng)詞。如：see,hear,smell,taste,feel, notice,look,appear，（表示感覺(jué)的詞）；hate,love,fear,like,want,wish,prefer,refuse, forgive（表示感情的動(dòng)詞）；be,exist,remain,stay,obtain（表示存在狀態(tài)的動(dòng)詞）；have,possess, own,contain,belong,consist of,form（表示占有與從屬的動(dòng)詞）；understand,know,believe,think,doubt,forget,remember （表示思考理解的動(dòng)詞）。
但是如果它們?cè)~義改變，便也可用進(jìn)行時(shí)態(tài)2. 過(guò)去進(jìn)行時(shí) 過(guò)去進(jìn)行時(shí)表示一個(gè)過(guò)去的動(dòng)作發(fā)生時(shí)或發(fā)生后，另一個(gè)過(guò)去的動(dòng)作正在進(jìn)行，或表示過(guò)去反復(fù)的習(xí)慣，常與always,continually,constantly等動(dòng)詞連用。3. 將來(lái)進(jìn)行時(shí) 將來(lái)進(jìn)行時(shí)主要表示將來(lái)某一時(shí)刻正在進(jìn)行的動(dòng)作，或表示要在將來(lái)某一時(shí)刻開(kāi)始，并繼續(xù)下去的動(dòng)作。
常用來(lái)表示禮貌的詢問(wèn)、請(qǐng)求等4. 完成進(jìn)行時(shí) （現(xiàn)在、過(guò)去、將來(lái)）完成進(jìn)行時(shí)是（現(xiàn)在、過(guò)去、將來(lái)）完成時(shí)的強(qiáng)調(diào)形式，將放在完成時(shí)態(tài)部分講述。 三、完成時(shí)態(tài) 完成時(shí)態(tài)通常表示已完成或從事的動(dòng)作。
它可分為： 1. 現(xiàn)在完成時(shí) （1）現(xiàn)在完成時(shí)用來(lái)表示對(duì)目前狀況仍有影響的，剛剛完成的動(dòng)作（常與yet,already,just連用），或者過(guò)去某一時(shí)刻發(fā)生的，持續(xù)到現(xiàn)在的情況（常與for,since連用）。（2）常與現(xiàn)在完成時(shí)連用的時(shí)間狀語(yǔ)有：since, for, during, over等引導(dǎo)出的短語(yǔ)；副詞already, yet, just, ever, now, before, often, lately, recently等；狀語(yǔ)詞組this week (morning, month, year), so far, up to now, many times, up to the present等 （3）完成時(shí)態(tài)可用在下列結(jié)構(gòu)中：This (That, It) is (was) the first (second…) time +定語(yǔ)從句；This (That, It) is (was) the only (last) + n +定語(yǔ)從句；This (That, It) is (was) +形容詞最高級(jí)+ n +定語(yǔ)從句。
如果主句的謂語(yǔ)動(dòng)詞是一般現(xiàn)在時(shí)，從句的謂語(yǔ)動(dòng)詞通常用現(xiàn)在完成時(shí)；如果主句謂語(yǔ)動(dòng)詞是一般過(guò)去時(shí)，從句謂語(yǔ)動(dòng)詞通常用過(guò)去完成時(shí)。2. 過(guò)去完成時(shí) （1）表示過(guò)去某時(shí)間前已經(jīng)發(fā)生的動(dòng)作或情況，這個(gè)過(guò)去的時(shí)間可以用by,before等介詞短語(yǔ)或一個(gè)時(shí)間狀語(yǔ)從句來(lái)表示；或者表示一個(gè)動(dòng)作在另一個(gè)過(guò)去動(dòng)作之前已經(jīng)完成。
（2）動(dòng)詞expect, hope, mean, intend, plan, suppose, wish, want, desire等用過(guò)去完成時(shí)，表示過(guò)去的希望、預(yù)期、意圖或愿望等沒(méi)有實(shí)現(xiàn)。例如： I had meant to take a good holiday this year, but I wasn't able to get away. 另外兩種表示“過(guò)去想做而未做的事”的表達(dá)方式是： 1)was / were + to have done sth, (3)過(guò)去完成時(shí)常用于以下固定句型： 1)hardly, scarcely, barely + 過(guò)去完成時(shí)+ when + 過(guò)去時(shí)。
2)no sooner +過(guò)去完成時(shí)+ than +過(guò)去時(shí)。3)by (the end of ) +過(guò)去時(shí)間，主句中謂語(yǔ)動(dòng)詞用過(guò)去完成時(shí)。
3. 將來(lái)完成時(shí) 將來(lái)完成時(shí)表示在將來(lái)某一時(shí)刻將完成或在另一個(gè)未來(lái)的動(dòng)作發(fā)生之前已經(jīng)完成的動(dòng)作；也可以用來(lái)表示一種猜測(cè)。常與將來(lái)完成時(shí)連用的時(shí)間狀語(yǔ)有： by (the time / the end of 。
5.英文短文（科學(xué)）
自我意識(shí) Self-Awareness Virginia Woolf/弗吉尼亞.吳爾夫 The man who is aware of himself is henceforth independent; and he is never bored, and life is only too short, and he is steeped through and through with profound yet temperate happiness. He alone lives, while other people, slaves of ceremony, let life slip past time in a kind of dream. Once conform, once do what other people do finer than they do it, and a lethargy steals over all the finer nerves and faculties of the soul, He becomes all outer show and inward emptiness; dull, callous, and indifferent. 凡是意識(shí)到自我的人從今往后才是獨(dú)立的；他永遠(yuǎn)不知疲倦，他明白生命苦短，所以完全沉浸于深深的而又適度的幸福之中。
他獨(dú)立生活，而別人是繁文縟節(jié)的奴隸，在醉生夢(mèng)死之中聽(tīng)從生命悄然流逝。一旦循規(guī)蹈矩，一旦人為亦為，呆滯就籠罩著靈魂中一切靈敏的神經(jīng)和官能。
靈魂變得徒有其表，其中空空；遲鈍，木然、冷漠。 Discovery Diane Ackerman/迪安.阿克曼 The word “discovery” literally means, uncovering something that's hidden from view. But what really happens is a change in the viewer. The familiar offers comfort few can resist, and fewer still want to disturb. But as relatively recent inventions such as the telescope and microscope have taught us, the unknown has many layers. Every truth has geological strata, and you can't have orthodoxy without a heresy. The moment a newborn opens its eyes, discovery begins. I learned this with a laugh one morning after delivering a calf. When it lifted up its fluffy head and looked at me, its eyes held the absolute bewilderment of the newly born. A moment before it had the even black nowhere of the womb, and suddenly its world was full of color, movement and noise. I've never seen anything so shocked to be alive. “發(fā)現(xiàn)”一詞，字面上是指揭開(kāi)某種視線以外的隱藏的事物。
不過(guò)其實(shí)是觀察者自身發(fā)生了變化。很少人能抗拒熟悉事物帶來(lái)的舒適，愿意擾亂這種舒適的人更少。
然而，正如望遠(yuǎn)鏡、顯微鏡這些較為近期的發(fā)明所揭示給我們的，求知事物具有多種層次。每個(gè)事實(shí)都有地質(zhì)層次，沒(méi)有異端也就無(wú)所謂正統(tǒng)。
新生兒睜開(kāi)雙眼的那一刻起，發(fā)現(xiàn)也就開(kāi)始了。我是在一天清晨給一頭小牛犢接生的時(shí)候突然意識(shí)到這一點(diǎn)的，不禁大笑。
小牛仰起毛茸茸的腦袋看著我，目光中透出這個(gè)新生命對(duì)世界的一無(wú)所知。片刻這前，它還呆在母體里某個(gè)黑暗而平靜的地方，突然，它的世界變得五光十色，變得活潑而喧鬧。
我從未見(jiàn)過(guò)任何東西在獲得生命時(shí)是如些的驚異。
6.科學(xué)英文手抄報(bào)
Science drink milk little common sense 5Drinking milk is good for health, but many people drink milk in still exist a number of the error on the idea, this paper introduces some scientific drinking milk little common sense.The 1 morning fasting drink milk should not be. Because the human body when fasting gastrointestinal peristalsis quickly, nutrition in milk are often too late to be absorbed quickly into the e.. In addition, big milk method is insufficient, because this will reduce in oral and salivary mixed opportunity, is not conducive to digestion and absorption. Drink milk before the best to eat some cookies, cakes, or eat snacks while drinking milk.2 night milk more favorable. Scientific studies found that, in the human body calcium metabolism will have a special rule: the evening especially midnight when the content of serum calcium, there will be a" trough", forcing the body through regulating mechanism of transport a portion of bone calcium supplement. In this way, calcium in the blood is temporarily maintained, but have reduced skeletal calcium in. Milk of calcium rich, therefore before bedtime drink a cup of milk, can compensate for human body needs calcium at night.3 milk should not be adding sugar boiling. Milk is rich in amino acids, in the condition of high temperature in the milk of lysine with sugars occurring Maillard reaction, generate a new compounds - fructosyl amino acid. This substance can not only for human digestion and absorption, but affect human health, the best milk fresh drinking, such as cold a little heating can.4 do not like milk can drink yoghurt. The milk has a" repulsive " most people with lactose intolerance, these people can try drinking yoghurt. In the yogurt lactose content significantly reduced, but almost all retain the milk nutrition, wherein the lactic acid bacteria in the human body can survive and reproduction, conducive to nutrient absorption and utilization and improve immunity. Yogurt not containing antibiotics, easy to digest the absorption to fasting drinking.5 can not be heated drinking yoghurt. Drink sour milk feeds mainly on its nutrition and live bacteria, such as yogurt heating, the body can only drink nutrition to lose biological activity of lactic acid bacteria, so don't heating after drinking.How birds sleepDuring the day, the birds in the branches through singing, fly freely in the blue sky, in the evening, they and we like to rest, sleep, restores the physical strength, but their sleeping position but each are not identical!Beautiful mallard ducks and swans, under water in daytime, and the rest of the night when the predator, also cannot leave their most loves water. They have beautiful long neck bending forward, head buried in the wings, and then let themselves floating in the water, while dreaming, and swim, is leisurely.Crane, stork, heron, long-legged bird always stand on one leg and sleep, tired to change the other foot rest, is a model.Partridge rest like swarms around in a circle, and then as head outwards inward end. In this way, regardless of the enemy from which direction the hit, they can find and run away.Thrush, Braun and other sounds melodious birds, sleep usually bent legs, claws bent up firmly grasp branches, so don't worry they will fell down from the tree.While the" night owl" birds of prey in the daytime, you can always see it open one eye, one eye closed, standing in the thick branches, in fact it is sleeping. The sleeping posture is it right? Very offbeat ah, it is in order to monitor the surrounding environment against enemy attack!= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =The fish will drown meFish have gills, can breathe water, fishes have a swim bladder, can be in the water freely ups and downs. However, some people say the fish that lives in the water will drown, is this true?Although it sounds ridiculous, but it is true. Fish is fish swimming" buoy", which can be inflated and deflated to adjust the proportion of fish body. In this way, the fish in the swimming requires only minimal muscle activity, will be in the light of floating stability. However, when the fish sink to a certain depth ( i.e." depth" ), the outside huge pressure will cause it to wither section bladder volume. At this time, it 's buoyancy less than its own gravity, so he can't help to submerged to, also do not float, and was ultimately unable to breathe and drowned. 。
7.科普英語(yǔ)小作文
Does Technology Prevent Creativity?Thanks to Lowell Monke, I am getting rather critical about tools and technology supporting creativity. In many cases technology distracts our concentration, causes problems to our social network and interferes with our natural rhythm of life. Monke's "Breaking Down the Digital Walls" is an interesting book and I am looking forward to read the forthcoming book. In the meanwhile, please take a look at his thought-provoking article "The Human Touch" . Just to give you an example of Monke's thinking: "What 'Information Age' values tempt us to forget is that all of the information gushing through our electronic networks is abstract; that is, it is all representations, one or more symbolic steps removed from any concrete object or personal experience". Another wake-up call came, when I read an interesting report from National Science Foundation (NSF) workshop about Creativity Support Tools. There were some guidelines for these Creativity Support Tools introduced . To me they are like from an HCI manual and similar to Shneiderman's "Leonardo's Laptop: Human Needs and the New Computing Technologies" - you remember those 4-phases: Collect - Relate - Create - Donate.What bothers me is the concept "Social Creativity" described the report. This concept and the related research is to me very inconsistent, it is mostly based on communities-of-practice research, not creativity research. I noticed it already when I participated a social creativity session in the HCI International (UAHCI) conference in Las Vegas. 僅供參考。
8.英語(yǔ)科普小知識(shí),急
Ever since they were first put on the market in the early 1990s, gentically mondified (GM， 轉(zhuǎn)基因) foods have been increasingly developed and marketed in many countries in the word,mainly on the basis of their promise to end the worldwide food crisis. But can GM technology solve world hunger problems? Even if it would ,is it the best solutiorr? Despite what it promiises,GM technology actually has not increased the production potential of any corp. In fact Studies show that the most crown GM croo. GM soybeans, has suffered reduced productivity. For instance, a report than analysed nearly two decades of research on mojor GM food crops shows that GM engineering has failed to significantly increase US crop production. Something else, however, has been on the rise, While GM seeds are expensive, GM companics tell farmers that they will make good profits by saving money on pesticides（殺蟲(chóng)劑）. On the contrary, US government data show that GM crops in the US have produced an overall increase in pesticide use compared to traditional crops. “ The promise was that you could use less chemicals and boost production. But nether is true,” said Bill Christison, President of the US National Farm Coalition. At the same time, the authors of the book World Hunger: Twelve Myths argue that there actually is more than enough food in the world and that the hunger crisis is not caused by production, but by problems in food distribution and politics. These indeed deserve our efforts and money. Meanwhile, the rise in food prices results from the increased use of crops for fuel rather than food, according to a 2008 World Bank report. As a matter of fact ,scientists see better ways to feed the world. Another World Bank report concluded that GM crops have little to offer to the challenges of worldwide poverty and hunger, because better ways out are available, among which “green” farming is supposed to be the first choice.。
