... eka actinium 类锕 series actinium 锕系 actinium lead 锕铅 ...
基于8个网页-相关网页
actinium series 锕系
uranium actinium series 锕铀系
actinium decay series [核] 锕衰变系
actinium uranium series 锕铀系
actinium-uranittm series 锕铀系
uranium-actinium series 锕铀系
actinium series compounds 锕系化合物
uranium m actinium series 锕铀系
actinium becay series 锕衰变系
series actinium
系列锕
以上为机器翻译结果，长、整句建议使用 人工翻译 。
There are three naturally occurring radioactive series - the thorium series, the actinium series, and the uranium series.
有三个天然存在的放射系列，即钍系、锕系和铀系。
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