骨密度

Effort Launched to Save Africas Lions The African Lion Environmental Research Trust, or ALERT, a conservation and restoration charity, is one of the organizations that will help to kick off the event. The non-profit organization said the lion is a na

发表于:2018-12-08 / 阅读(55) / 评论(0) 分类 VOA标准英语2013年(五月)

This would put a pipeline to take natural gas 将设置天然气运输管线 from the Beaufort Sea through the heart 从波弗特海穿越 of the third largest watershed basin in the world, 世上第三大水域中心 and the only one which is 95 per

发表于:2018-12-08 / 阅读(89) / 评论(0) 分类 TED演讲娱乐篇

Powered Exoskeletons Give Assistance in Walking, Lifting Powered suits that could help paralyzed people walk and others lift and carry heavy loads with ease have been an inventor's dream since late 19th century. But they had to wait until the 21st ce

发表于:2018-12-16 / 阅读(69) / 评论(0) 分类 VOA标准英语2015年(七月)

Few other countries are so dominated by their capital: for Egyptians to speak of one is to speak of the other. The Mother of the World nurtures more than 16 million Egyptians, Arabs, Africans and sundry international hangers-on in a collision of East

发表于:2018-12-27 / 阅读(70) / 评论(0) 分类 英语听力小短文走遍全世界

City kids have smorgasbord of food choices. But they also face food allergies more than do their country cousins. Researchers mapped food allergies in children across the U.S. And they found more cases per capita in areas with high population densiti

发表于:2019-01-08 / 阅读(100) / 评论(0) 分类 Scientific American(六)月

This is the VOA Special English Development Report. The Sahel is the area of Africa that lies between the Sahara desert to the north and more fertile land to the south. The dry plains of the Sahel are mostly treeless. Yet in Niger, one of the nations

发表于:2019-01-11 / 阅读(77) / 评论(0) 分类 VOA慢速英语2007年(二)月

助行走外骨骼机器人 Powered suits that could help paralyzed people walk and others lift and carry heavy loads with ease have been an inventor's dream since late 19th century. But they had to wait until the 21st century for the advanced materi

发表于:2019-01-14 / 阅读(48) / 评论(0) 分类 VOA标准英语2015年(十二月)

DAVID GREENE, HOST: For the first time, scientists have figured out just how many tiny critters are living inside your kitchen sponge. Now, don't fear. NPR's Michaeleen Doucleff says there is something you can do about this. MICHAELEEN DOUCLEFF, BYLI

发表于:2019-01-16 / 阅读(82) / 评论(0) 分类 2017年NPR美国国家公共电台9月

So as bad as all that is, things are going to get much worse, much, much worse. 整个情况如此糟糕,而且将会每况愈下。 This is the infrastructure as we see it about now. 以上是我们目前所知的基础设施。 This is what's pla

发表于:2019-01-18 / 阅读(54) / 评论(0) 分类 TED演讲商业篇

But Zwicky was also capable of insights of the most startling brilliance. In the early 1930s, he turned his attention to a question that had long troubled astronomers: the appearance in the sky of occasional unexplained points of light, new stars. 然而

发表于:2019-01-29 / 阅读(55) / 评论(0) 分类 万物简史

本期真题 1. First published in 1927, the charts remain an ______ source for researchers. A) identical B) indispensable C) intelligent D) inevitable 2. Joe is not good at sports, but when it ______

发表于:2019-02-01 / 阅读(60) / 评论(0) 分类 英文语法词汇

A dog once stole a bone from a butcher's shop.He ran off down the street as fast as he could,across the meadow in the village and down the hill to a rough bridge over a stream.There he paused,panting,to look at the clear,clean water.Wha

发表于:2019-02-02 / 阅读(85) / 评论(0) 分类 趣味英语

今天我们要讲几个包括bone这个词的习惯用语。Bone是骨头。我们要学的第一个习惯用语是: feel in your bones。Feel in your bones这个习惯用语用了有一百来年了。它的起源很有趣,曾经骨折或者有风湿

发表于:2019-02-06 / 阅读(125) / 评论(0) 分类 美国习惯用语

When, in 1960, still a student, 1960年我还是学生时, I got a traveling fellowship 拿到出国留学的奖学金, to study housing in North America. 研究北美的住宅建筑。 We traveled the country. 我们游遍美国, We saw public

发表于:2019-02-13 / 阅读(54) / 评论(0) 分类 TED演讲教育篇

Looking up at the night sky, we are amazed by how it seems to go on forever. 仰望夜空,我们为它的永无止境而感到惊讶。 But what will the sky look like billions of years from now? 然而数十亿年前的天空又会是什么样子呢

发表于:2019-02-13 / 阅读(68) / 评论(0) 分类 TED演讲教育篇

And so, by loading up its ballast tanks, or by sinking obliquely with its slanting fins, 诺第留斯号或者是把所有的储水池装得特别满,或用纵斜机板斜斜下降, the Nautilus successively reached depths of 3,000, 4,000, 5,000,

发表于:2019-02-17 / 阅读(64) / 评论(0) 分类 《海底两万里》中英双语有声读物

Science and technology 科学技术 Ancient animal behaviour 远古动物行为 Jurassic lark 侏罗纪雨燕 How the pterosaur caught its supper 翼龙是如何逮到晚餐的 PALAEOETHOLOGY, working out how long-extinct animals behaved, is a subjec

发表于:2019-02-17 / 阅读(51) / 评论(0) 分类 经济学人科技系列

For an hour plains of sand unrolled before our steps. 在一小时内,一片细沙的平原在我们脚下摆开。 Often the seafloor rose to within two meters of the surface of the water. 平原时常升至距海面不及两米的深度。 I coul

发表于:2019-02-25 / 阅读(68) / 评论(0) 分类 《海底两万里》中英双语有声读物

After its fishing was finished and its air supply renewed, 鱼捕完了,空气调换了, I thought the Nautilus would resume its underwater excursion, 我想诺第留斯号又要作海底旅行了; and I was getting ready to return to my stater

发表于:2019-02-25 / 阅读(74) / 评论(0) 分类 《海底两万里》中英双语有声读物

-Penny:Leonard might come home. Leonard可能快回来了。 Can we talk in my apartment? 能到我的公寓里谈吗? -Sheldon:We're not done? 还没说完? -Penny:No. 没有。 -Sheldon:Eh, why not? 哎呀,好吧。 We're already through

发表于:2019-03-16 / 阅读(298) / 评论(0) 分类 生活大爆炸第一季