waste-gas desulfurization

例句：

1. 1.The waste gas from the factory is a major source of air pollution.
   工厂的废气是主要的空气污染源。
2. 2. The company has implemented waste gas desulfurization technology to reduce emissions.
   该公司已经采用了废气脱硫技术来减少排放。
3. 3. In order to comply with environmental regulations, the plant must undergo waste gas desulfurization.
   为了遵守环境法规，该厂必须进行废气脱硫。