top blowing oxygen

例句：

1. 1.The top blowing oxygen is used to cool the surface of the liquid.
   顶部吹入氧气用于冷却液体的表面。
2. 2.The top blowing oxygen was used to create a vacuum in the chamber.
   顶部吹入氧气被用来在腔室中创造真空。
3. 3.The top blowing oxygen was used to purify the air in the room.
   顶部吹入氧气被用来净化房间中的空气质量。