motive 和 motivation 都作名词“动机”时有什么区别?并请举例,谢谢~

motive:"Was there some more sinister motive for their action "
"I urge you to quenstion his motive."
motivation:"the motivations behind our organization"
"There's a political motivations for there actions."
如例,前者接人物,后者接事物
motivation是引起人们动机的一个因素,也即motivation引起了motive.