discharge gas

例句：

1. 1.The factory is discharging a large amount of carbon dioxide into the atmosphere.
   工厂正在向大气中排放大量的二氧化碳。
2. 2.The scientist used a special device to discharge gas from the sample container.
   科学家使用一种特殊的装置从样品容器中排出气体。
3. 3. The firefighters had to discharging gas to contain the fire.
   消防员不得不排放气体来控制火势。