1 . Overburden had concealed the radioactivity.

覆盖层屏蔽掉了放射性.

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2 . Soil survey should be adopted in such soil overburden areas.

在此类土壤覆盖区应采用土壤测量.

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3 . Overburden pressure for three hundred years, isolated the light of day.

覆压三百余里, 隔离天日.

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4 . The overburden strata movement is a complicated time and space process.

上覆岩层的运动是一个复杂的时空过程.

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5 . Microbial oxidation of ores, tailings, and overburden contribute s to ARD.

微生物氧化的矿石 、 料和覆盖岩层会产生酸性岩排水.

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