音标:['tetrә'haidreit] ;
n. [化]四水合物

This is Scientific American Sixty Seconds Science, I'm Sophie Bushwick, got a minute? When Mexican tetra fish moved into darker caves long ago, they evolved to deal with the dark by becoming albino and going blind. A new research shows that the chang

发表于:2018-12-24 / 阅读(189) / 评论(0) 分类 Scientific American(一)月

(MA) Scientists are always on the lookout for alternative sources of energy. Today we're going to discuss one that's so plentiful they say it could supply more energy than all the coal and oil in the world. It's found in something called gas hydrate

发表于:2018-12-30 / 阅读(173) / 评论(0) 分类 托福听力短文

T Tanshinone IIA 丹参酮IIA Tanshinone I 丹参酮I Tanshinone IIB 丹参酮IIB Taraxasterol 蒲公英甾醇 Taraxerol 蒲公英赛醇 Tauro ursodesoxy cholic acid 牛磺熊去氧胆酸 Taxifolin 花旗

发表于:2019-01-03 / 阅读(168) / 评论(0) 分类 医务英语

Japan said Tuesday it had successfully extracted methane hydrate, known as fire ice, from its seabed, possibly unlocking many years' worth of gas for the resource-starved country. In what they are claiming as a world first, a consortium is drilling f

发表于:2019-01-08 / 阅读(132) / 评论(0) 分类 英语阅读理解

Ben Carter Powdered material called dry water, could provide a new way to store carbon dioxide in an effort to fight global warming. Dry water looks a lot like fine white sand, which isn't surprising since what makes it dry is that each tiny water dr

发表于:2019-01-14 / 阅读(175) / 评论(0) 分类 VOA标准英语2010年(九)月

It's very hard to tell. We've just hit the water. It's very hard to tell what altitude we're at. We've crashed the airplane at 930 feet. It seems clear that flying into that methane caused enough confusion in the instruments and with Thomas and he en

发表于:2019-01-22 / 阅读(191) / 评论(0) 分类 自然百科2010年

10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur

发表于:2019-02-17 / 阅读(196) / 评论(0) 分类 万物简史

本期内容: How much you sweat doesn't necessarily correlate with the intensity of your workout. It is due to a number of factors, including gender (men tend to sweat more than women) and age (younger people sweat more than older people) as well

发表于:2019-02-20 / 阅读(135) / 评论(0) 分类 夏说英语新闻晨读
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