injector kier

例句：

1. 1.The doctor injects the medicine into her arm.
   医生将药液注入她的手臂。
2. 2.He needs to inject the medication into his vein.
   他需要将药物注入他的静脉。
3. 3.The nurse injects the patient with an anti-venom.
   护士给病人注射抗毒素。