rational

• 基于理智或逻辑的，符合理智或逻辑的；也指人明智、讲道理。

Based on or in accordance with reason or logic.

1. Based on reasonB2formal

   Based on or in accordance with reason or logic, rather than emotion.

   理性的

   • She made a rational decision based on the facts.
   • A rational approach to problem-solving is essential.
   • His argument was clear and rational.

   同义词cogentjudiciouslogicalreasonablesensiblesound

   反义词absurdemotionalillogicalintuitiveirrationalunreasonable

2. Sane or sensibleB2formal

   Having the ability to think clearly and make sensible decisions.

   理性的

   • He remained rational even during the crisis.
   • It's hard to be rational when you're very angry.
   • The patient was not considered rational at the time.

   同义词clear-thinkingjudiciouslevel-headedlogicalreasonablesanesensiblesound

   反义词illogicalinsaneirrationalsenselessunreasonableunwise

• 名词，指有理数，即可以表示为两个整数之比的数或数学量。

A noun referring to a rational number, or a mathematical quantity that can be expressed as a ratio of two integers.

不可数

1. Rational numberB2formal

   A number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

   有理数

   • In mathematics, 3/4 is a rational number.
   • All integers are rational numbers because they can be written as a fraction.
   • The set of rational numbers includes both positive and negative fractions.