reason,cause 和 excuse 有什么区别?

reason,cause 和 excuse 有什么区别? excuse,reason,cause,explanation四个词有什么区别 请问reason,excuse,cause,explanation都有理由的意思,用法上有什么区别? reason cause excuse 与explanation 区别? reason.purpose.cause.excuse的区别 reason/cause/excuse/source的区别 reason和cause区别 purpose,reason,cause 有什么区别 cause和reason用法区别 cause 和reason 的区别. cause和reason的区别 reason和excuse的区别