air cleaning

例句：

1. 1. Air pollution is a major concern for public health.
   空气污染是公共卫生的主要问题。
2. 2.The hospital uses advanced air cleaning systems to improve patient recovery rates.
   医院使用先进的空气净化系统来提高患者的康复率。
3. 3.To reduce air pollution, we need to implement stricter emission standards and promote the use of eco-friendly products.
   为了减少空气污染，我们需要实施更严格的排放标准，并推广使用环保产品。