单词：borosulfate
单词：borosulfate 相关文章
This is the VOA Special English Education Report. Most American schools have boys and girls in the same classroom. But a public high school in the small, rural town of Boonsboro, Maryland, offers a special program. Top students in the ninth and tenth
2010年VOA慢速英语(十二)月
Economy, Post Office Woes Force Iowa Town off Map The United States Postal Service is facing unprecedented financial losses. Postmaster General Patrick Donahoe recently told lawmakers his agency needed government intervention by the end of the year t
VOA标准英语2011年(九月)
Legislation 法规 A: Has your company been affected much by government legislation? A:政府法规对你们公司影响大吗？ B: Yes, we have. We've had to clean up our production process a lot to meet tough government standards. B:是。为了严格
职业技术英语口语
Protamine sulfate is a drug that reverses the anticoagulant effects of liver compounds such as heparin. Protamine is extracted from the sperm of salmon and other species of fish, and then made into a protamine sulfate injection which is a necessary d
世界各地新闻集锦
In public high schools across America, large classes containing a mix of both boys and girls are the norm. However, in a move that's drawing high marks from students, one public school in Maryland has decided to buck that tradition. Class experimentA
VOA标准英语2010年(十一)月
We keep pumping carbon dioxide into the atmosphere and the earth keeps warming. Climate scientists have predicted that the consequences of unchecked warming could result in everything from catastrophic flooding to larger and more deadly hurricanes. S
英语时差8，16
First off, I'll mention that at the bottom of the sea there exist veins of zinc, iron, silver, and gold whose mining would quite certainly be feasible. 首先，我对您说，海底有锌、铁、银、金等矿藏，开发并不是不可能的事。
《海底两万里》中英双语有声读物