A forcing in.

注入。

That which is forced in.

注入物。

The act of forcing a liquid into some part, such as the rectum; also, the liquid so forced in; an enema; a hypodermic.

【医】注射物；注射液；灌肠剂；皮下注射液。

The placing of an artificial satellite or a spacecraft into an orbit or on a trajectory.

射入轨道；送入轨道(将人造卫星或太空船射入预定的轨道)。