单词：number density of molecules
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The World’s Top Ten Destinations 1 Ankor Wat is part of a vast network of around a hundred ancient temples hidden deep in the Cambodian 1) jungle. A thousand years ago, this was a 2) thriving wooden
疯狂英语2003年
The wolves thus addressed the sheep-dogs [00:02.38]Why should you, (1)-{who are like us in so many things [00:06.11]not be entirely of one mind with us [00:09.33](2)-{and live with us as brothers should [00:11.78]We differ from you in one point only.
决胜四级听力必备
[00:03.89]deed deem deep deepen [00:08.76]n.（已完成的）行为， vt.认为，相信 a.深的，深刻的 v.变深,变浓 [00:13.64]deeply deer defeat defect [00:18.26]ad.深深地 n.鹿 v./n.挫败,战胜n.失败 n.缺陷，缺点 [00:22.88]de
考研英语词汇2005
New Words 2B @ unexpected a. not expected and therefore causing surprise 想不到的，意外的 @ strengthen v. become strong or make sth. stronger （使）变强；加强；增强 @ succession n. [sing.] a number of people or things of the same k
新视野大学英语读写教程词汇 第三册
[00:11]Day 27 [00:13]democratic [00:14]E-mail is a convenient, [00:16]highly democratic informal medium [00:19]for conveying messages that [00:21]conforms well to human needs. [00:25]density [00:26]The population density is about 500 people per squar
星火英语四级2000核心词
Now, back to the mole. Not that mole. 现在，回到摩尔，不是鼹鼠。 This mole. Yep, this number has a second name.The mole. 这个摩尔，没错，这个常数有另一个名字,摩尔. Chemists use the term mole to refer to the quantities
TED演讲教育篇
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? Athletes have obviously been tempted to use performance enhancing anabolic steroids. Drug testing may discourage such use. But a new study finds that some of the perfo
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From the depths of space, an asteroid hurtles toward Earth. [Well, our general vicinity.] But this is no ordinary hunk of galactic debris. Because the body of this asteroid seems to defy gravity. Its bound by forces never observed on this scale in sp
2014年Scientific American(八)月
Recycling Plastics When plastic containers are recycled, they are first cleaned, then ground into tiny pellets and put into a flotation tank. This separates out the various plastic resins from other waste material. Once they are separated out, the pl
英语时差8，16
Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? 有件事情我们总觉得理所当然：室温下把一些冰块放入水中，
初学者听力文摘精选
How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a
英语听力文摘 English Digest
By Anjana Pasricha New Delhi 20 August 2006 Indian minister for Communications and IT Dayanidhi Maran, right, and Chief Minister of Jammu Kashmir state Mufti Mohammed Sayeed during launch of network expansion in Srinagar, India (File photo) In India
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Science and Technolgy 科技 Social science 社会科学 Wisdom about crowds 关于群体的思考 To model the behaviour of humans en masse, treat them as people, not molecules 在为人类的全体活动建立模型时，要将他们看作是人，而
经济学人科技系列
Science and technology 科学技术 Astrochemistry 天体化学 The great test tube in the sky 空中的大试管 Space is one big chemistry set 宇宙是一个很大的化学装置 MOST people think of the empty space between the stars as being, wel
经济学人科技系列
Times Higher Education (THE) last Wednesday reveals its BRICS And Emerging Economies University Rankings 2017. 《泰晤士报高等教育》（THE）于上周三公布了2017年《金砖国家和新兴经济体大学排名》。 China's institutions
英语新闻
How Do You Make A Diet-Coke Float? 你能让无糖可乐浮起来吗？ Heres an at-home experiment you can try. Take a can of classic Coca-Cola and a can of Diet Coke, and without opening either one submerge them in water. A deep sink or a bucket wi
英语听力文摘 English Digest
People who habitually live at altitude have often spent thousands of years developing disproportionately large chests and lungs, increasing their density of oxygen-bearing red blood cells by almost a third, though there are limits to how much thicken
万物简史
21. Eliminating problems by transferring the blame to others is often called scape-goating. 21. 用怪罪别人的办法来解决问题通常被称为寻找替罪羊。 22. The chief foods eaten in an
实用英语
What was actually interesting to us was not that the bacteria made light, but when the bacteria made light. 事实上，我们感兴趣的部分并不是细菌会不会发光，而是细菌何时发光。 What we noticed is when the bacteria were alo
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