新东方优美背诵短文50篇 Unit40:Cohesion-tension Theory

40 Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ni

科学美国人60秒 SSS Cannibalism Quells Contagion among Caterpillars

Cannibalism Quells Contagion among Caterpillars 同类相食可防治传染病 Ben Van Allen collects caterpillars. 本 范 艾伦喜欢收集毛毛虫。 While doing postdoctoral research at Louisiana State University, 在路易斯安那州立大学做

VOA常速英语2014--Biologist Creates Portrait Gallery of North American Bees 生物学家绘制北美蜜蜂精美肖像画

Biologist Creates Portrait Gallery of North American Bees 生物学家绘制北美蜜蜂精美肖像画 While the collapse of honey bee colonies in North America is still an unsolved mystery, a biologist with the U.S. Geological Survey is trying to p

Daily English-2016年09月06日

Age is a very high price to pay for maturity. 年纪是成熟的代价。 图片1

科学美国人60秒 SSS Pollinators Shape Plants to Their Preference

Pollinators Shape Plants to Their Preference我的进化来自你的偏好 Honeybees are the charismatic microfauna of the pollination world. But flies, bumblebees, butterflies and mothsthey all pollinate, too. With varying degrees of success. The po

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How To Defend Your Gardens From Frostbite: Antifreeze For Plants D:Why is the glum face,Yeal? Y:I spend a small fortune on plants for my garden this year,but an early frost destroied half of them. D:You are not the only person who is lost plants to a

英语听力文摘 English Digest 559、世界上最大的痰盂！

The Worlds Biggest Spittoon In the spring, the eastern half of North America turns into one big spittoon for spittlebugs. Wandering through a meadow, its easy to spot the gobs of foam they produce, stuck to the stems of various plants. What makes spi

英语听力文摘 English Digest 563、植物的自我防御！

Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,

英语博客：ESL Podcast 821 – Eating Contaminated Food

Rachel: This tastes funny. Sergey: Its fine. Theres nothing wrong with it. Rachel: It tastes like its tainted or something. Dont you detect a funny metallic taste? Sergey: No, its perfectly fine. Just eat it. Rachel: I swear theres something off abou

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At first glance, dust storms do not seem very fascinating. Winds pick up fine particles from the ground, and then the air becomes thick with dust. What is interesting, though, is that dust storms can travel across the ocean, sometimes from continent

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Metallica Lang Lang One 二十世纪八十年代后期，欧美摇滚乐坛上重金属音乐正在鼎盛时期，而此时出现的Thrash Metal（激流金属）象一股洪流一样冲击着乐坛。这种流派的创始者就是1981年在美国洛杉

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This vast secret ocean of seething metallic hydrogen, not a molten iron core, is the power house generating Jupiters dangerous energy shroud. But there is one more mystery hidden inside this giant alien onion, the key to the origin of the planets the

英语听力文摘 English Digest 466、谁在啃我的叶子！

作为一株小小的或是大大的植物(矛盾吗?),被生长在厚厚的泥土之下的根所束缚着,只能眼睁睁地看着虫子、鸟儿啃食自己的叶子,啄食自己的果实?植物也有保护自己的方法哦,一起来看看吧 Plan

英语听力文摘 English Digest 71、恒温调节器

Thermometers just tell you the temperature. Thermostats need to do more than that. In addition to reading the air temperature, thermostats also turn your furnace on if the air gets too cool, and turn it off again when the air heats up. How do they do

英语听力：自然百科 金星和水星旅行指南 Venus and Mercury-19

Valor will be tackling the acid clouds of Venus with little help from flying pan technology. This being two weather balloons are we watched Venus in the mid-1980s. This with wagon machines there were two sep balloons that the Russians put them in the

英语听力：自然百科 金星和水星旅行指南 Venus and Mercury-17

You never guess the dangers on the ground from orbit, except maybe for this, massive, double-barreled storms hovering above the poles. Of this, what we called dipole features trailing around, we don't know what, really what they are, but the whole fe

英语听力文摘 English Digest 324、可乐的神奇清洁能力

The Cleaning Power of Soft Drinks! 饮料的神奇清洁能力 Lets begin with a cleaning tip: If you have some tarnished or corroded brass that you want to clean, an old brass candlestick for example, you can use Coca-Cola, or any other cola soft dr

英语听力文摘 English Digest 333、猫吃蜘蛛吗？

Do Cats Eat Spiders? 猫吃蜘蛛吗？ Do cats eat spiders? Our answer? Yes, they do. And thats not all cats will eat. Cats, both domestic and wild, are obligatory carnivore s , meaning that they dont have the chemical tools in their bodies to acces

英语听力文摘 English Digest 361、小小灶神星

Vesta 灶神星 You can see the planet Jupiter on a clear night, but Jupiter is humongous. Mars and Mercury are smaller than that, and you can see them, too. Wait a minute, our moon is even smaller, and you can see that. Could anything smaller than t

英语听力文摘 English Digest 300、二氧化碳能增加食欲？

All This Carbon Dioxide is Making Me Hungry 伊利诺伊大学的研究人员在《美国国家科学院院刊》（PNAS）网络版发布的一项最新研究报告显示，大豆类作物的抗虫害能力正随着二氧化碳含量的增多而逐渐