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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
BBC Learning English People and Places Hany El Hamzawy William:Hello and welcome to People and Places the programme where you meet interesting people with interesting stories! My names William Kremer. Today, I thought wed practise some listening com
人与地方
U up to 起来,从事于,忙于;直到;该由…,轮到,胜任,适于 make use of 利用 put to use 使用,利用 use up 用完,花完 as usual 像往常一样,照例 V a variety of 种种,各种 join
考研英语
W ward off 防治,避开 warm up 变热 by the way 顺便提一下 by way of 经由,通过…方式 give way 让路,让步 in a way 在某点,在某种程度上 in no way 决不 in the way of 妨碍 i
考研英语
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