“half-life”的概念、定义、翻译、参考文献-科学参考

单词	half-life
释义	half-life [`haf ´līf] ^CHEMISTRY The time required for one-half of a given material to undergo chemical reactions. ^NUCLEONICS The average time interval required for one-half of any quantity of identical radioactive atoms to undergo radioactive decay. Also known as half-value period; radioactive half-life.
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