60秒科学:城市生活增强感染性疾病抵抗力

The descendants of longtime urban dwellers show increased genetically driven resistance to tuberculosis, due to evolutionary selection pressure over millennia. Christopher Intagliata reports 城市长久居住民的后代，经过数千年的自然选择

AGRICULTURE REPORT - Genetically Engineered Crops Increasing

AGRICULTURE REPORT – January 29, 2002: Genetically Engineered Crops Increasing By George Grow Soybeans This is the VOA Special English AGRICULTURE REPORT. Increasing numbers of farmers are growing g

AGRICULTURE REPORT - Study of a Biotech Plant Finds Pollen C

AGRICULTURE REPORT - Study of a Biotech Plant Finds Pollen Can Travel Farther than Thought By Mario Ritter Broadcast: Tuesday, October 05, 2004 This is Gwen Outen with the VOA Special English Agricult

VOA标准英语2015--讲述月球行走的纪录片

Documentary Tells of Last Astronaut to Walk on Moon 讲述月球行走的纪录片 AUSTIN, TEXAS In 1972, Eugene Cernan and two fellow astronauts began what would become the last mission to the moon, Apollo 17. On December 14, 1972, after scratching

VOA常速英语2018--鸣禽或可助人类攻克语言障碍

The tiny brain of this zebra finch may help scientists answer questions on how people form words to talk. Like humans songbirds learn to vocalize by imitation. Were able to not only just study the mechanisms of how vocal learning works in these songb

VOA慢速英语2011--Long History, Unclear Future for 'Golden

This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 White rice is the world's most popular form of rice. But it goes through a milling process that removes many nutrients. As a result, people who eat a

科学美国人60秒 SSS DNA Points to Multiple Migrations into the Americas

DNA Points to Multiple Migrations into the Americas 美洲多次殖民迁移之谜 For more than ten thousand years, Alaska Native and Canadian First Nations people have lived along the Northwest coast of North America. Now, ancient remains have prov

英文书摘精选 狗是如何成为"人类最好的朋友"的呢?

How Did Dogs Become Mans Best Friend? 狗是如何让成为人类最好的朋友的呢？ Weve all heard the phrase dog is mans best friend. But how did dogs get to be so friendly with humans? It turns out that dog domestication wasnt simply a matter

英文书摘精选 The Genetic Relationships Between Bears熊之间的遗传关系（

Researchers at Penn State University and the University of Buffalo have completed the most in depth bear DNA study to date. The project has revealed a lot about genetic relationships between bears, and also the unlikely romances that pepper their his

英文书摘精选 How To Find A Tasty Tomato如何挑选美味番茄

Most of us have had the same experience. We see a big, red tomato in the grocery store, take it home for our salad, and find out that it tastes like cardboard. 大多数人都有过这样的经历，从商店里挑选出又大又红的番茄回去做沙

英伦广角 2015-02-07 英国议会下院通过“三亲育子”技术法案

If you're confused by Three Parent... you come to the right place. This is my kitchen lab. The eggs here are somewhat larger but the principles are the same and allows me to demonstrate what scientists hope to do with humans. Inside the egg core are

专业术语—口腔生理学术语C4(英文详解)

Covalent bond - a strong bond between atoms formed by sharing outer electrons. When an atom has 8 outer electrons it is stable. Those which naturally have 8, like neon and argon gasses are quite unrea

万花筒 2010-03-22&03-23 见过六块腹肌的鱼吗？

Its taken ten years of experiments. But researches at the University of Rhode Island have finally perfected a fish with 6-pack abs, and muscular shoulders. Professor Terry Bradley said his fish have 15% to 20% more muscle mass than normal trout. Bulk

美国科学60秒 SSS 2012-12-03

In the last decade scientists have managed to sequence the genomes of everything from bacteria and fruit flies to individual human beings. But often overlooked are the genomic sequences of our food. We know the genomes of apples, bananas, potatoes, w

美国科学60秒 SSS 2012-11-12

Rising season severe storm is the most talked about threats of climate change. But here is another. No more coffee. Because rising temperatures make cripple wild populations of Arabica coffee, and most cultivated species in the world. So says a study

全国硕士研究生入学统一考试---英语2005年试题及解析

2005年全国硕士研究生入学考试英语试题及答案 Section I Use of English Directions: Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANS

科学美国人60秒 SSS 鸟类唱歌导师很重要

Finches Can Learn to Sing Differently Than Their Genetics Dictate In the most recent podcast we discussed how baby bats learn their callsfrom all the other bats in their crowded colonies. And we mentioned in passing that songbirds usually get tutored

科学美国人60秒 SSS 2014-07-21

Nothing says overeducated egghead like a pair of coke-bottle glasses. But even clichs sometimes hit the nerd on the head. Because a new study finds that nearsightedness is linked to the number of years spent in school. The findings can be viewed in t

英语听力：自然百科 北极熊 冰上间谍 Spy_Bear—4

But polar bear courtship is never straightforward. She likes to play hard-to-get. It's also a challenge for blizzardcam. She's testing his fitness, making sure he is a good catch. He skills on the slopes show room for improvement. And now, the female

学个词Learn a Word 第1225期 genetic

今天我们要学的词是 genetic, genetic is spelled g-e-n-e-t-i-c; genetic. Genetic 基因的。最新研究发现，人体对咖啡因的需要跟基因有关。The researchers compared the genetic makeup and caffeine consumption habits of more