To drive or force in; introduce, as a liquid, by mechanical means.

推入；注射(液体)。

To introduce, as a remark.

插入(一句话、幽默)等。

To force (a liquid) into a combustion chamber.

注入；灌入(指在压力下将液体注入锅炉或将燃料注入燃料室)。

To introduce (something different).

加入(某些不同的事物)。