mo·ti·va·tion/ˏmotə`veʃən; ˌməʊtɪˈveɪʃən/ n 1 [U] when you are keen and willing to do something 动力; 积极性: Jack is smart, but he lacks motivation. 杰克很聪明，但他缺乏动力。 2 [C] the reason why you want to do something 动机; 原因: + for What was your motivation for writing the book? 你写这本书的动机是什么？