gassing

例句：

1. 1.gas emission, 2. gas treatment, 3. gas combustion。例句：1. The factory has been under stricter emissions regulations recently.
   最近，这家工厂受到了更严格的排放规定。
2. 2.Gas treatment is essential for the safe operation of this chemical plant.
   对这家化工厂的安全运行来说，气体处理至关重要。
3. 3. The gas combustion process is used to produce electricity from coal.
   煤气燃烧过程用于从煤炭中产生电力。