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	n't NT nth Nth. NTP nu nuance nub nubble nubile nuchal nuci- nuciferous nucivorous nuclear nuclease nucleate nuclei nucleic acid nucleo- nucleolus nucleon nucleonics nucleoprotein nucleoside

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