单词：heptyl sulfate
单词：heptyl sulfate 相关文章
PEOPLE IN AMERICA -October 27, 2002: Alan Shepard By Avi Arditti VOICE ONE: I'm Shirley Griffith VOICE TWO: And I'm Steve Ember with the VOA Special English program, People in America. Each week we te
People in America
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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Sing to me，my dearest nightingale，said a shepherd to the silent songs tress one beautiful spring evening．Alas！said the nightingale，the frogs make so much noise，that I have no inclination to sing．Do you not hear them？ Undoubtedly I hea
趣味英语
A bureaucrat was hiking when he came upon a shepherd tending a large flock. The bureaucrat took a fancy to the sheep and asked the shepherd, If I can guess how many there are, may I have one? The shepherd thought it unlikely the man would guess the e
趣味英语
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