drain cistern

常见例句

双语例句

• Water came down from the roof through a small drain carved in the outside north wall of the grotto. It was led to a small pool which served to decant it before it flowed into the cistern proper.
  水从屋顶沿著北边外墙挖的小水管流下来，形成一个小水池为协助它徐缓地流入更适合的贮水槽。
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