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 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	invocation invoice invoke involuntary involuntary manslaughter involve involved involvement invulnerable inward inward investment inward-looking inwardly inwards in work in writing inyanga in your cups in your depth in your dreams in your eighties in-your-face in your middle 30s/40s etc in your middle 30s/40s etc. in your mind’s eye

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