例句
There have been several blockages in the sewer recently.
最近下水道发生了好几次堵塞。
The blockage in the pipe was caused by a buildup of debris.
管道中的堵塞是由碎屑堆积造成的。
There have been several blockages in the sewer recently.
最近下水道发生了好几次堵塞。
The blockage in the pipe was caused by a buildup of debris.
管道中的堵塞是由碎屑堆积造成的。