irrational: can imply mental derangement, but it MORE OFTEN suggests lack of control by or open conflict with reason: our world which often seems ~.



unreasonalbe: is likely to suggest guidance by some force other than reason such as ambition, greed, or stubbornness that makes or shows one decifient in good sense: made ~ demands on a friend.


irrational不理性: 可表示精神错乱，但更多表示不受理性控制或与之抵触， unreasonable无理: 被野心贪婪固执等非理性因素引导。



记忆方法: 1）UI你我相处==>不能无理取闹


         2）两个词的差异是导致非理性的原因不同。irrational原因宽，unreasonable常表示野心贪婪顽固等原因，语气严重一些。



        3）无理的意思是不受理性引导，或无法理性思考mean not governed or guided by reason or not having the power to reason.