单词：Silicate minerals
单词：Silicate minerals 相关文章
Rare Minerals May Be in North Korea 稀有矿物质可能在朝鲜发现 Hello and welcome back. Im Jim Tedder in Washington. Today we are going to talk about something that is worth a lot of money, and it is buried in the ground. Were not exactly go
2014年VOA慢速英语(二)月
Bipartisan legislation on so called conflict minerals was recently introduced in the US House of Representatives. The bill is designed to create transparency and allow consumers to make informed choices when they purchase electronic devices like cel
VOA标准英语2009年(十一月)
Science and Technology Plastics There and back again 科技 塑料 旧法新用 An old idea may help solve the problem of plastic waste 一个老方法也许可以帮助解决塑料垃圾的问题 PLASTICS were once regarded as wonder-materials. They
经济学人科技系列
manganese n. 锰（元素符号为Mn） mantle composition 覆盖物的成分 Mercury n. 水星 molten v. 溶化；adj. 熔铸的 monitor n. 监视器，监控 mudflow n.[地] 泥流 Neptune n. [天]海王
英文语法词汇
BEIJING, Nov. 7 (Xinhuanet) -- A huge asteroid will pass closer to Earth than the moon on Tuesday, but experts say there is no cause for alarm. Asteroid 2005 YU 55 will pass about 300-thousand kilometers from the earth. The giant space rock is about
英语新闻
The U.S. space agency NASA's Mars probe Phoenix has detected icy snow falling through the Martian atmosphere. The spacecraft has also discovered material in the planet's soil that is leading scientists a step closer in their conclusion that life pro
VOA标准英语2008年（十月）