排水沟;泄水沟
The drain is clogged with hair. The water won't drain. The gutter was stopped up with mud and the rain water could not flow away.
排水孔塞满了头发。水放不出去。水沟被泥堵住了,雨水排不出去。
A block in the pipe, gutter, drain, etc
阻塞管道、排水沟、下水道等的污物
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