Mud slides and floods are likely, with streams and rivers carrying off the topsoil.

泥石流和洪水很有可能会发生，河流将冲走表层泥土。

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Professor Bushberg says removing the topsoil might make the land safe for use. But it depends on the depth of the radioactive material.

布希柏格教授说，移除表层土壤可以保证土地的使用安全，但这取决于放射性物质渗入的深度。

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In most cases, extracting oil involves chopping down the forest that blankets the region, draining the boggy ground, stripping off the topsoil and literally digging up the oily sand below.

在大多数情况下，要从油沙中提炼出石油需要先把覆盖该地区的森林砍掉，排干地面的水分，去掉表层土然后当然就是把地下的油沙挖出来。

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Local people removed the topsoil to reveal the bedrock of the South Dorset Ridgeway underneath.

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The company stockpiles the topsoil which contains the nutrients, organic debris and plant seeds that are stripped away during mining.

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It was created by local people in 1808 by removing the topsoil to reveal the bedrock of the South Dorset Ridgeway underneath.

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