于是她发现沥青油矿，它的放射性要比铀本身还要强。

Then she found that pitchblende was more radioactive than uranium by itself.

youdao

任何新的油矿发现都将花费数年才能开发出来。

Any new discovery would take years to exploit.

youdao

任何新的油矿发现都将花费数年才能开发出来。

Any new discovery would take years to exploit.

youdao