sewage sludge gas

例句：

1. 1. The factoryproduces a lot of sewage sludge gas during the operation.
   工厂在运行过程中产生了大量的污水污泥气体。
2. 2. The sewagesludge gas is harmful to theenvironment and needs to be treated before itcan be released into the air.
   污水污泥气体对环境有害，需要经过处理才能排放到空气中。
3. 3. The sewage sludge gas was detected in the area wherethe accident happened.
   事故发生地检测到了污水污泥气体。