单词：rubidium perchlorate
高氯酸铷
单词：rubidium perchlorate 相关文章
China has launched two satellites into space on a Long March carrier rocket from the Xichang Satellite Launch Center in Sichuan Province. The satellites are part of the country's growing BeiDou Navigation Satellite System. The launch of the Long Marc
发表于:2019-01-19 / 阅读(172) / 评论(0)
2018CRI中国国际广播电台
2018CRI中国国际广播电台
If we are looking for Martian bugs, we should search for life forms at least as tough and alien as this. Im looking at Mars in a point of view of a microbe. And as a microbe, I really need very, very tiny amount of water. I could probably live my ent
发表于:2019-02-03 / 阅读(104) / 评论(0)
自然百科2012年
自然百科2012年
As July 4th approaches, Americans look to the skies. Throughout the country, fireworks will be launched in celebration of the nation's independence. But what goes up must come down. Reporter Eric Libby looks at the environmental issues surrounding f
发表于:2019-02-04 / 阅读(124) / 评论(0)
VOA标准英语2008年（七月）
VOA标准英语2008年（七月）