pitchblende
n. [矿物] 沥青铀矿
例句
The radiometric age of pitchblende is 109-108 m.
沥青铀矿的同位素年龄为108—109百万年。
The pitchblende is the chief industrial mineral.
沥青轴矿是主要工业矿物。
Uranium mineral is pitchblende which was formed in Lower Proterozoic.
铀矿物主要为沥青铀矿，形成于早元古代。
