the act of putting a liquid or gas back somewhere, especially liquid into a person's body using a needle and syringe (= small tube)

The cells were treated and then transferred to a plastic syringe for reinjection.

The treatment involves the withdrawal and re-injection of blood.

Some of the water is sent back underground using a reinjection process. 一些水通过回注过程被送回地下。

the act of putting something that had been lost or removed back into a situation or process

What this country needs is a re-injection of traditional ideas.

Her speech provided a welcome reinjection of humour into the proceedings. 她的演讲为会议程序重新注入了喜人的幽默感。