cut-off filter

例句：

1. 1.The water was so dirty that we had to use a cut-off filter to clean it.
   水太脏了，我们不得不使用切断过滤器来清洁它。
2. 2.The engineer used a cut-off filter to remove the pollutants from the air.
   工程师使用了切断过滤器来从空气中去除污染物。
3. 3.The farmers used a cut-off filter to protect their crops from pests and diseases.
   农民们使用了切断过滤器来保护他们的作物免受害虫和疾病的侵害。