sweep gas

例句：

1. 1.The team used a sweep gas to clear the area.
   这个团队使用了一种扫气来清理这个区域。
2. 2. The sweep gas was used to clean the air in the room.
   扫气被用来清洁房间里的空气。
3. 3.The sweep gas was used to remove the dust from the floor.
   扫气被用来从地板上清除灰尘。