1 [C,U] (an) injection (of sth) (into sb/sth) the act of putting a drug or substance under the skin of a person's or an animal's body with a needle (a syringe) 注射: to give sb an injection 给某人注射a tetanus injection 破伤风注射剂: An anaesthetic was administered by injection. 以注射进行麻醉。 [SYN] jab 同义词为jab

2 [C] a large amount of sth that is added to sth to help it 投入的大量…: The theatre needs a huge cash injection if it is to stay open. 这家剧院需要投入巨额现金才不致倒闭。

3 [U] [C] the act of forcing liquid into sth 喷射: fuel injection 燃油喷射