catalytic filter

例句：

1. 1.The catalytic filter in the car helps to reduce emissions.
   汽车中的催化过滤器有助于减少排放。
2. 2. The scientist used a catalytic filter to purify the air.
   科学家使用了一个催化过滤器来净化空气。
3. 3. The catalytic filter is crucial for maintaining the cleanliness of the environment.
   催化过滤器对于保持环境的清洁至关重要。