名词 why:

1. the cause or intention underlying an action or situation, especially in the phrase `the whys and wherefores'

whyadv.为什么conj.... 的理由；为什么int.咳；哎呀n.理由；谜Whybrown.怀布罗Whytlawn.怀特洛Whyburnn.怀伯恩Whythamn.怀特姆Whympern.温珀Whymantn.怀曼特Why not(+动词原型)：为何不 ... (用来提建议)why?adv.为什么conj.... 的理由；为什么int.咳；哎呀n.理由；谜whydunitn.犯罪动机小说why ever究竟为什么

1. I told them the whys and wherefores of my action.
   我告诉他们我行动的理由。