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 n. Chem. a radioactive metallic element whose chief isotope yields actinium by decay. Usage Symb.: Pa. Etymology: G (as PROTO-, ACTINIUM)
随便看	underskirt underslung undersold undersow underspend understaffed understand understanding understate understeer understood understorey understudy undersubscribed undersurface undertake undertaker undertaking undertenant underthings undertint undertone undertook undertow undertrick

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