A block in the pipe, gutter, drain, etc
阻塞管道、排水沟、下水道等的污物
the cable provides a continuous drain path for melting snow and ice to flow (through the gutter and into the downspout ).
电热带(为融化雪和流动的冰)提供了一条连续的排水的路径。
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。
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