air injection

例句：

1. 1. The patient was given an air injection to relieve his pain.
   病人接受了空气注射以缓解疼痛。
2. 2. During the surgery, the doctor used air injection to open up the wound.
   手术期间，医生使用空气注射来打开伤口。
3. 3. Air injection is a common technique used in dentistry to remove decayed teeth.
   空气注射是一种常见的牙科技术，用于去除腐烂的牙齿。