I suspected her motives in offering to help.

她主动要帮忙，我怀疑她的动机。

《牛津词典》

They have their own motives in opposing government regulation.

他们有自己的动机去反对政府监管。

youdao

Do you think Dean has any ulterior motives in buying me a new microwave oven?

你认为迪安给我买新微波炉是因为他有什么隐秘的动机吗？

youdao

If,instead,the South dissects the North's motives, it will in his words "drop a bomb" on inter-Korean relations.

VOA: standard.2009.09.07

David Matsanga, the former chief negotiator for Kony in peace negotiations with the Ugandan government, expressed exasperation at trying to comprehend the motives behind the expanding attacks.

VOA: standard.2009.08.27

Whatever the emir's motives in holding an election, most Qataris took to campaigning with glee.

ECONOMIST: Qatar

It is unfair to attribute personal motives in the ministry's reservations about the multiple registrar model.

ECONOMIST: Letters: On Mitt Romney, India, Switzerland, common law, "The Iron Lady", executive pay, theme parks, walking, the Olympics | The

The soloist himself did not say anything about Ms Vorontsova when he spoke about his motives in court.

BBC: Profile: Pavel Dmitrichenko