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。

In that state of mind you can't make a rational decision. I'm sure there's a perfectly rational explanation for it. Adrenalin blocks out all rational thought. He has a very rational way of looking at things. Let's …

Most of the time, the rational part of the mind controls the information coming from the primitive core and makes its own decisions as to what to do and how to respond.

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The meaning of RATIONAL is having reason or understanding. How to use rational in a sentence.

designating or of a real number or quantity expressible as the ratio of two integers, with the second integer not being equal to zero: all integers and fractions are rational numbers

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rational 侧重指思考、处理、解决问题是依照逻辑情（based on clear thought、logic and reason），是理智的、头脑清醒的、合情合理的，强调“理性”，并不是凭感觉冲动从事。

In that state of mind you can't make a rational decision. I'm sure there's a perfectly rational explanation for it. Adrenalin blocks out all rational thought. He has a very rational way of looking at things. Let's …

RATIONAL definition: 1. based on clear thought and reason: 2. (of a number) that can be expressed as the ratio of two…. Learn more.