英语词汇“pearl, raymond”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	pearl, raymond
释义	See Raymond Pearl See Raymond Pearl Pearl, Raymond Pearl, Raymond, U.S. biologist, 1879-1940. Pearl index - the number of failures of a contraceptive method per 100 woman years of exposure.
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Pearl, Raymond