The first step was to line the drain area with small stones. This enables the keeper to hose the small stones covering the concrete without the stones washing into the drain.

第一步就是用小石子排满排水区域，这样管理员就可以避免在用水管冲洗地面的时候把沙石冲到排水沟里面。

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A contractor was hired to drain the reservoir and to excavate soil from one area for replacement with clay.

一个承包商被雇来排干蓄水池里的水，然后挖出其中一块地方的泥土，换上粘土。

《柯林斯英汉双解大词典》

There was some indication on April 19th that water has found new ways to drain away from the crater area, which is encouraging in this respect.

4月19日的一些迹象—水发现新的方法从火山口区域流走，正是这一观点的论据。

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Officers, who had been investigating reports of drain covers being stolen in the area, stopped the van, being driven by Leith, and found nearly 20 drain covers in the back.

BBC: Worcestershire and Solihull drain cover thief jailed

In fact, the committee said, new roads might actually drain economic activity from a depressed remote area.

BBC: Campaigners angry at Growth and Infrastructure Bill