英文科普小短文?以下內(nèi)容選自一本科普讀物。I. 既然血液是紅色的,為什么靜脈是藍(lán)色的呢?事實(shí)上,靜脈并非藍(lán)色的,而是更接近淡黃色。盡管在人體外的血液看起來(lái)是紅的,但在皮膚淺表的靜脈里,它更接近紫色,但又略顯暗紅。在皮膚深層,那么,英文科普小短文?一起來(lái)了解一下吧。
以下是從一本很流行的科學(xué)書(shū)中節(jié)選的一段。
如果血液是紅色的,那么陸襲晌靜脈為什么是藍(lán)色的呢?
事實(shí)上,靜脈不是藍(lán)色的。更早鋒清晰的來(lái)說(shuō)他是淡黃色的。盡管從我們身體流出的血液看起來(lái)是紅色的,但是當(dāng)血液在離我們皮膚表面很近的時(shí)候,它呈現(xiàn)的是紫紅色的。當(dāng)靜脈里淌滿紅色的血液后,它會(huì)因?yàn)橹車(chē)つw顏色的影響和對(duì)比而看起來(lái)更像藍(lán)色。
你的大腦和心臟哪個(gè)工作更賣(mài)力些?
這基本上是看你更忙著思考還是忙著運(yùn)動(dòng)。在運(yùn)動(dòng)鍛煉過(guò)程中,你心臟的工作程度要比平時(shí)高出三倍,它似乎禪謹(jǐn)是要生產(chǎn)出夠一輩子用的血液去維持身體這個(gè)超大油輪。但是從長(zhǎng)遠(yuǎn)上看,你的大腦或許更勝一籌,因?yàn)榧词故悄闶裁匆膊桓勺谀抢?,大腦都要消耗掉比心臟多兩倍的能量,并且需要四到五倍的血液去維持大腦的運(yùn)轉(zhuǎn)。

以下內(nèi)容選自一本科普讀物。
I. 既然血液是紅色的,為什么靜脈是藍(lán)色的呢?
事實(shí)上,靜做升脈并非藍(lán)色的,而是更接近淡黃色。盡管在人體外的血液看起來(lái)是紅的,但在皮膚淺表的靜脈里,它更接近紫色,但又略顯暗紅。在皮膚深層,這些充血的靜脈反射出的紅色光線稍遜于周邊的皮膚,反襯之下就呈藍(lán)色了。
II. 哪個(gè)工作更忙,粗前心臟還巖胡清是大腦?
這要看你是忙于思考還是忙于運(yùn)動(dòng)。在運(yùn)動(dòng)時(shí),心臟的工作強(qiáng)度足足是大腦的三倍,在人的一生中傳輸?shù)难鹤阋匝b滿一個(gè)超級(jí)油箱。但是,從長(zhǎng)期來(lái)看,大腦很可能更忙,因?yàn)榧词谷俗粍?dòng),大腦消耗的能量仍然是心臟消耗的兩倍,因此它也需要四到五倍的血液來(lái)供應(yīng)。
人工翻譯,如有不妥請(qǐng)指正
(標(biāo)題1)如果血液是紅色的,為什么靜脈血是藍(lán)色的嗎?
實(shí)際上,在所有的靜脈不是藍(lán)色的。他們?cè)絹?lái)越清晰,色澤微黃。盡管血是紅色時(shí)它的身體外面,當(dāng)它在皮膚表面的血管,它更是一個(gè)暗紫色。在正確的深度,這些充滿血液的靜脈反射較少的紅頌滑淡比周?chē)钠つw,使它們看起來(lái)藍(lán)色的比較。
(標(biāo)題2)是你的心臟或大腦工作更努力?
這類取決于你是否忙或忙著鍛煉思維。你賀耐的心是三倍的努力在運(yùn)動(dòng)過(guò)程中,并將足夠的血液來(lái)填補(bǔ)油輪過(guò)一輩子。但是,從長(zhǎng)遠(yuǎn)來(lái)看,你的大腦可能提示它,因?yàn)榧词鼓阕愕拇笠芭呐D腦是使用兩倍,你的心太多的能量,它需要四到五倍的血液喂它。
GLOBAL WARMING(溫室效應(yīng))
Everywhere you look right now you will hear about the pheonomia of “global warming.” To understand global warming you need to understand the difference between climate and weather. Climate, as defined by Webster’s Dictionary is “叢粗the average course or condition of the weather at a place over a period of years as exhibited by tepemperature, wind velocity, and precipition” while weather is the “state of the atmosphere with respectto heat or cold, wetness or dryness, calm or storm, clearness or cloudiness”滲棚鎮(zhèn) (Webster). Therefore climate describes the weather over time. Climate change and global warming are frequently used interchangeable but like climate and weather they do have different definitions. “Climate change refers to any significant change in measures of climate for an extended period” and global warming is an increase in the temperature of the atmosphere near the Earth's surface and in the troposphere, which can contribute to changes in global climate.
Global warming is caused by several causes such as pollution from factories, carbon dioxide from rotting trees, the burning of coal, natural gasses and fossil fuels lead to methane travelling into the Earth'和孝s atmosphere any transportation vehicles, water vapour, and many other little things, which contribute to make global warming even worse.
Scientists have different opinions about whether the current global warming is natural or unusual. Some believe that it is part of the Eath's natural cycle of warming and cooling. However most believe that what we are now experiencing is unusual and has been caused by human activities.

First, English is aworld language. It is said that you can communicate everywhere if you know English. Second, China is opposed to the opportunity to develop is economy worldwide.It is essential to know other countries' economic and cultural background. English is the key to the success. Third, more and more foreigners are interested in Chinese literature and culture. Mastering the English, we can better promote our heritage and let more people understand and like China.摘自《 蘇教高弊山版小學(xué)六年級(jí)金卜禪卷》戚中
以上就是英文科普小短文的全部?jī)?nèi)容,2、the popular science knowledge and science technology 科普知識(shí)與科學(xué)技術(shù) 歷史上有很多發(fā)明,起著很重要的作用,其中一些改變了世界。依你之見(jiàn),什么是最重要的發(fā)明,并說(shuō)明原因,也就是它起的作用(不少于三點(diǎn))。80詞左右。