经济学人:分子生物学 蛋白质的奥秘(3)

One common protein-contact prediction is that, if the side chain of one member of a pair of amino acids brought close together by folding is long, 一种比较普通的蛋白质接触预测就是，如果一对氨基酸的一个侧链折叠后很长，

通过艺术创作支持国家公园

Supporting National Parks Through the Arts Artist Rosalie Haizlett starts every day by opening a map of the Great Smokey Mountains National Park. Over breakfast, she plans her walk for the day. She packs food and a sketch book, and then leaves for he

SSS 2011-11-14

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Think of the weirdest creatures you've ever seen in a sci-fi film. Now think of this: there are far stranger, albeit smaller, critters living in your o

SSS 2011-02-03

Orchids are among the most successful flowering plants, with more than 22,000 species around the world. And thats not just because of the obsession they inspire in their human fans. Researchers spent 10 years studying orchids in South Africa, where t

SSS 2012-07-16

This is scientific Americans 60 second science,I'm Cynthia Graber.This will just take a minute.A coal mine can decrease the local environment but a Fungi may indivertantly help cleanup the mine with its own waste products. Researchers worked with the

美联社新闻一分钟 2007-08-08

1. Efforts to reach six Utah coal miners trapped more than 1500 feet underground will take at least three days. That's according to one of the mine's owners who says rescuers aren't sure the men survived the cave-in. There has been no word from them

VOA慢速英语 2007 0911a

This is the VOA Special English Agriculture Report. Strip cropping Nigeria is the world's largest cowpea producer. Cowpeas are also called black-eyed peas. But there is always room for improvement. Recently, before the start of another farming seaso

英语日常语法:不寻常的复数

Everyday Grammar: Unusual Plurals 英语日常语法:不寻常的复数 One fish, two fish, red fish, blue fish, goes the Dr. Seuss childrens story. Why isnt it two fishes? You may think, Ok, its hard to count fish so we group them all together. No p

VOA慢速英语2016 什么是肺炎？怎么预防？

AS IT IS 2016-09-15 What is Pneumonia and How Do You Get it? 什么是肺炎？怎么预防？ This week, presidential candidate Hillary Clinton made news -- not for what she said, but for her health. 这一周，总统候选人希拉里克林顿（H

经济学人166:清道夫平菇

Science and technology 科学技术 Bioremediation 生物降解 Bottom feeders 清道夫平菇 A novel way of dealing with an unpleasant problem 解决烦人难题的新颖方法 For your delight and delectation 愿你欢愉 DESPITE their name, dispo

英语听力文摘 English Digest 461、红色谷仓缘何而来？

Why Barn s Are Red Yal: This was a great idea, Don. It's a beautiful day for a drive to the countryside. Don: Yep! Y: Hey, there's a big red barn . An another one, also red. I wonder why so many barn s are painted red. D: I don't have to wonder . I'v

“回到未来”日：专家预测2045年的生活

《回到未来2》上映于1989年，片中主角从1985年穿越到了2015，演绎了对2015年的一系列怪异预测。 Although several of the film's predictions, like video calls and wearable technology, came true, Back to the Future II showe

精彩托福句子 2

11.Acids are chemical compounds that,in water solution,have a sharp taste， a corrosive action on metals,and the ability to turn certain blue vegetable dyes red. 12.Billie Holiday's reputation as a great jazz-blues singer rests on her ability to giv

TED演讲：宏观历史(7)

For most of that time of life on Earth, living organisms have been relatively simple -- single cells. 地球的大多数时间，生物体多是以简单的单细胞存在的。 But they had great diversity, and, inside, great complexity. 但是它们是

人死的时候身体会发生什么变化呢？

在我们的生活中，死亡是我们所有人必定会遇到的事情，无论是家庭成员还是宠物，甚至是你都将有终结之时。事实上，每分钟世界上大约就有100人死亡。但在人死之时到底会发生什么呢？

关于CET-6阅读的100个经典句型(2)

11. Acids are chemical compounds that, in water solution, have a sharp taste, a corrosive action on metals, and the ability to turn certain blue vegetable dyes red. 11. 酸是一种化合物，它在溶

你会用“逗号”吗？

1. 在并列连词(and, but, for, nor, or, yet )前使用，用来连接句中的各分句。 The principal reason for this is that none of them possesses chlorophyll, andsince they cannot synthesize their own carbohydrates, they obtain their supplie

英语听力文摘 English Digest 169、What are fungi, plants or animals?

Well, mushrooms are merely one of many types of fungi. Not all fungi grow in soil. However, mushrooms and other fungi do resemble plants in many ways, so much so that scientists long classified fungi plants, but they know better now. Eating Habits Wh

英语听力文摘 English Digest 220、慢性鼻窦炎

Chronic Sinusitis 慢性鼻窦炎，亦称慢性化脓性鼻窦炎。常因急性化脓性鼻窦炎反复发作未能得到适当治疗所致。以多粘液或脓性鼻涕、鼻塞、头痛及嗅觉减退或消失为主要临床症状。现代西医学

英语听力文摘 English Digest 243、真菌是动物还是植物？

What are fungi, plants or animals? 真菌是动物还是植物？ 真菌（Fungus）是一种真核生物。最常见的真菌是各类蕈类，另外真菌也包括霉菌和酵母。现在已经发现了七万多种真菌，估计只是所有存在的