单词：cis-stereoisomer
[化] 顺式立体异构体
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This is Morning Edition from NPR news. I am Steve Inskeep and I am Susan Stamberg. Russian and Chinese forces today begin 8 days of joint military exercises. Some ten thousand troops are expected to take part, making this their largest joint military
发表于:2019-01-08 / 阅读(292) / 评论(0)
2005年NPR美国国家公共电台
2005年NPR美国国家公共电台
By Robert Raffaele Washington 27 March 2008 A new type of surgery may make it easier for patients who would otherwise require a more invasive procedure. The new type of operation makes it possible for doctors to remove unwanted tissue through a patie
发表于:2019-01-09 / 阅读(246) / 评论(0)
VOA标准英语2008年（三月）
VOA标准英语2008年（三月）
As was the common practice with the gods of Olympus，Zeus and Hermes were visiting the world in disguise．One day they came to a village．At a thousand house sthey knocked，and a thousand times they were refused rest and food and drink．At last
发表于:2019-01-30 / 阅读(266) / 评论(0)
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