英语词汇“radioactivity”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	radioactivity
释义	ra·di·o·ac·tiv·i·ty (rā′dē-ō-ăk-tĭvĭ-tē) n. 1. Spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction. 2. The radiation, including alpha particles, nucleons, electrons, and gamma rays, emitted by a radioactive substance.
随便看	einkorn Einstein Einsteinian einsteinium Eire Eisaku Eisenach Eisenhower Eisenhower Eisenstaedt Eisenstein eisteddfod either either-or ejaculate ejaculation ejaculator ejaculatory ejaculatory duct eject ejecta ejectable ejection ejection seat ejective

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