engagementn.约会；约定；订婚；婚约；雇用；交战；(机器零件等)啮合engagement economy打工经济engagement accuracy啮合准确性engagement to marry婚约engagement Memorial定亲启engagement analysis啮合分析engagement resource评价系统理论engagement and flow责任和流畅感engagement altitude投入战斗高度,开火高度engagement doctrine射击准则engagement strategy干预策略