Pitchblende and chalcolite are much more radioactive than uranium itself.
瀝清鈾礦和銅鈾云母比純鈾的放射性強(qiáng)得多.
辭典例句
英英釋義
Noun
1. a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore
