The violence was clearly prompted by political motives.
这次暴力事件显然是由政治动机引发的。
It’s not the kind of thing he’d do unless he had an ulterior motive (= a reason he kept hidden ) .
他不会做这种事的,除非他另有隐情。
adj. motor、 motivated、 motionless、 motivational、 motional、 motiveless
v. motivated