They are motivated by a need to achieve.

对成功的渴望激励着他们。

The crime was not politically motivated.

该罪行没有政治动机。

How do you motivate people to work hard and efficiently?

你是如何激励人们努力而高效地工作的？

Never let it be said that the manager doesn't know how to motivate his players.

绝不能让人说该教练不懂如何激励他的球员。