engagementn.约会；约定；订婚；婚约；雇用；交战；(机器零件等)啮合engagement principle啮合原理Engagement equations啮合方程engagement indicator啮合指示器engagement controller啮合调节器engagement memorandum业务备忘录Engagement simulation攻防对抗仿真engagement effectiveness射击效能engagement of fetal head胎头衔接engagement or employment[法] 聘用或雇用engagement as an alliance作为一个联盟进行作战