clogged filter

例句：

1. 1.The water in the toilet is so clogged that it takes hours to flush.
   厕所里的水太脏了，需要好几个小时才能冲干净。
2. 2. The drain in the kitchen was clogged and we had to call a plumber.
   厨房的下水道堵塞了，我们不得不请管道工来修。
3. 3.The filter in the air conditioner is clogged and needs to be cleaned regularly.
   空调的过滤网堵塞了，需要定期清理。