air cleaner and silencer

例句：

1. 1.The air cleaner in the office is veryeffective at removing pollutants from theair.
   办公室的空气净化器非常有效，能从空气中去除污染物。
2. 2. The sound suppressorinstalled in the factory has greatly reduced noiselevels during production.
   工厂安装的消声器大大降低了生产过程中的噪音水平。
3. 3. Theair cleaner and silencer are essential toolsfor maintaining a clean and quiet environment.
   空气净化器和消声器是保持清洁和安静环境所必需的工具。