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	undermentioned undermine underneath under negotiation undernourished under observation under offer underpaid underpants underpass underpay underperform underpin underpinning underplay underpopulated under pressure underprice underprivileged underproduction under protest underrate underrated underrepresented underresourced

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