神智清楚的；理性的；理智的；合理的
n.合理的事物；[数]有理数；懂道理的人，人类；〈英〉合理的服装
复数：rationals
同义词：rational number
adj.consistent with or based on or using reason"rational behavior"; "a process of rational inference"; "rational thought"
of or associated with or requiring the use of the mind"the triumph of the rational over the animal side of man"
同义词：intellectualnoetic
capable of being expressed as a quotient of integers"rational numbers"
having its source in or being guided by the intellect (distinguished from experience or emotion)"a rational analysis"
rational design合理的设计
rational choice理性选择；理性抉择
rational analysis示构分析；示性分析
rational thinking理性思维
rational construction结构合理；合理建构法
rational function[数]有理函数
rational number有理数
rational behavior理性行为
rational expectation理性预期；合理预期
rational formula有理公式
rational being理性存有
rational index有理数指数
更多收起词组短语这组词都有“明智的，合情合理的”的意思，其区别是：
sensible一般指合乎常情、切合实际的行为与思想，侧重明白事理。
rational指有理性的，有思维推理能力，而不是凭感觉冲动从事。
reasonable一般不十分着重推理的能力，而往往用来表示合乎情理、公正或务实。
rational, reasonablerationala.理性的，区别于无理性；理智的，区别于感情用事的。
The rational thing to do was to take the sick man to a doctor.理智的做法是送病人去看医生。
reasonablea.有道理的，公平合理的，或指人讲道理的。
That man works very hard, so it is reasonable for him to ask for more money.那个人工作努力，所以他要求加薪是合情合理的。