injector spacing

例句：

1. 1.The doctor used a needle to inject the medicine into my arm.
   医生用针将药液注入我的手臂。
2. 2. The surgeon carefully measured the injector spacing before performing the surgery.
   外科医生在做手术前仔细测量了注射器的间距。
3. 3. The patient was given an injection of insulin to regulate his blood sugar levels.
   患者被注射胰岛素以调节他的血糖水平。