单词：iron-free sulfate
单词：iron-free sulfate 相关文章
By David McAlary 27 June 2006 A new U.S. public health report concludes there is no safe level of environmental tobacco smoke. The nation's top public health physician, the Surgeon General, says inhaling someone else's tobacco smoke leads to an imme
2006年VOA标准英语（六月）
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
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[00:07.23]Listen and Share [00:10.53]Wrinkle-free 免熨 [00:20.52]词汇扫描 [00:24.89]grab [gr?b] 抓住 [00:27.75]iron ['ai?n] 烫衣服 [00:31.23]tag [t?g] 标签 [00:34.20]wrinkle-free ['ri?kl][fri:] 防皱的 [00:37.49]英文原文 [00:39.55]
英语笑话（MP3+文本）
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