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Polonium

[pə'ləʊnɪəm]

解釋/意思:

(noun.) a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor.

整理:雷蒙德--From WordNet

例句/造句/用法:

錄入:奥维尔

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