motive 动机；目的

motivation 动力；动机

motivated 有动机的，有目的的

driving forces 驱动力，驱动因素

实例：

1.Greed was his only motive for stealing.

贪婪是他盗窃的唯一动机。

2.He's intelligent enough but he lacks motivation.

他很聪明，但缺乏积极性。

3.I'm not motivated by money, otherwise I would have quit.

我不是为了钱来的，否则我早就退出了。

4.Cooperation between government and enterprise offers a driving force for bilateral cooperation.

政府与企业间的交流是加强双方合作的动力。

出处：头条号 @坚小持微课