铀矿山坑道污水含有铀、镭、钍、钋等放射性核素，外排前必须加以处理。

There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine.

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铀矿山坑道污水含有铀、镭、钍、钋等放射性核素，外排前必须加以处理。

There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine. The effluent must be treated before discharging.

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铅同位素研究揭示，该板块富铀、钍，从而为铀矿省的形成提供了必不可少的地质前提。

The plate is enriched in U and Th revealed by Pb-isotopic study, which plays an role of essential prerequisite for the formation of U province.

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