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 noun uncountable chemistry UK /ˌprəʊtækˈtɪniəm/ DEFINITIONS1 1 a chemical element that is a radioactive metal. Its symbol is Pa. Synonyms and related words Chemical elements actinium alkali metal aluminium protactinium noun uncountable chemistry US /ˌproʊtækˈtɪniəm/ DEFINITIONS1 1 a chemical element that is a radioactive metal. Its symbol is Pa. Synonyms and related words Chemical elements actinium alkali metal aluminum
随便看	callous calloused call out call-out callow call round call someone to account (for something) call (someone’s) attention to call someone’s bluff call something into existence/being call something into question/doubt call the shots/tune call the tune/shots call time call time on something call to action call to arms call up call-up call upon callus call waiting call/bring/throw something into question calm calm down

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