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

单词	protactinium
释义	protactinium n. Chem. a radioactive metallic element whose chief isotope yields actinium by decay. Usage Symb.: Pa. Etymology: G (as PROTO-, ACTINIUM)
随便看	instance instancy instant instantaneous instanter instantiate instantly instar instate in statu pupillari instauration instead instep instigate instil instinct instinctive institute institution institutional institutionalize Inst.P. instruct instruction instructive

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