她捐款的动机可能是为了提升公司形象。

Her ___motive for donating might be to improve the company's image.

这幅画中重复出现的花朵图案是艺术家的主要创作主题。

The recurring flower pattern in this painting is the artist's main ___motif.

这种新型电动机的驱动力非常强劲。

The ___motive force of this new electric motor is very powerful.