单词：Tetracyn
音标：['tetrəsin] ；
【药物、商标】四环素
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医务英语
10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur
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万物简史