英语词汇“protactinium”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	protactinium
释义	protactinium /proh'tak tin"ee euhm/, n. Chem. a radioactive, metallic element. Symbol: Pa; at. no.: 91. Also, protoactinium. [1915-20; PROT- + ACTINIUM]
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