单词：boron minerals
单词：boron 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)
第一句： We have been importing and exporting all kinds of metals and minerals for thirty years. 我们经营各种金属和矿石的进出口业务已经有30年了。 A: We have been importing and exporting all kinds of metals and minerals for
天天商务口语
New Report Shares Secrets of Rare Blue Diamonds History The Hope Diamond is one of the worlds most famous jewels. It was in the possession of a series of people: kings, bankers, rich women and thieves, before its arrival 60 years ago at the Smithsoni
2018年VOA慢速英语(八)月
Mining 采矿业 Geology or geography? 地质还是地理理论? Miners should spread their risks across countries as well as minerals 矿业公司应用多国开采和多矿产开发以分散风险 THE past half-dozen years have been kind to miners.
经济学人商业系列
Unit 9 Eat a well-balanced diet. Unit 9 饮食均衡 Remember having to memorize the four food groups when you were a kid and wondering if you were really going to need this information when you grew up? 记得你小时候要死背，而当时却怀疑
减肥瘦身英语口语话题