英语词汇“alpha particle”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	alpha particle
释义	alpha particle noun : a positively charged nuclear particle identical with the nucleus of a helium atom, consisting of 2 protons and 2 neutrons, having atomic mass 4 and atomic number 2, ejected at high speed in certain radioactive transformations
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