单词:hydrogen cloud
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单词:hydrogen cloud 相关文章
Rho Ophiuchi dark cloud is one of the closest star-forming regions to our own solar system. Located near the constellations Scorpius and Ophiuchus, the nebula is about 407 light years away from Earth. The infrared astronomical satellite, now celebra
发表于:2018-12-05 / 阅读(62) / 评论(0)
国家地理2008年
Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa
发表于:2018-12-07 / 阅读(74) / 评论(0)
VOA2003(上)-科技导航
on a cloud under a cloud 你们肯定都知道英文里的前置词有时会使人很混乱,它们在句子里虽然不显眼,但是作用却很关键,用错了一个前置词意思可能完全不
发表于:2019-01-09 / 阅读(86) / 评论(0)
美国习惯用语