Pitchblende and chalcolite are much more radioactive than uranium itself.

沥清铀矿和铜铀云母比纯铀的放射性强得多.

辞典例句

Chalcolite ( crystallized phosphate of copper and uranium ) is about twice as radioactive as uranium.

铜铀云母 ( 铜和铀的磷酸盐结晶体 ) 的放射性是铀放射性的两倍.

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