音标：['ræʃәnl] ；柯林斯词典等级：2 级；

a. 理性的, 合理的
n. 有理数

a. consistent with or based on or using reason
a. capable of being expressed as a quotient of integers
s. having its source in or being guided by the intellect (as distinguished from experience or emotion)

词型变化：名词复数形式 : rationals
考试类型：[四级/六级/考研/托福/IELTS/GRE]

词性分布：

形容词100%

rational的用法和样例：

例句

用作形容词(adj.)

Your choice was perfectly rational under the circumstances.在那种情况下,你的选择是相当合理的。
Man is a rational being.人是有理性的生物。
No rational person would go to work in his pyjamas.任何神智正常的人都不会穿着睡衣去上班。

用作名词(n.)

The rational numbers also fit into this scheme.有理数也适用于这个图形。
A rational number can be expressed as a ratio of two integers.有理数可以被整数整除。

常见句型

用作形容词(adj.)

用作定语～+ n.

It was a rational plan and bound to succeed.这是一个合理的计划，肯定会成功。
She is a rational woman.她是一个有理性的女人。

用作表语S+be+～

The reasoning seems rational.这论据似乎是合乎情理的。

词汇搭配

用作形容词 (adj.)

～+名词

rational analysis有道理的分析
rational argument合理的论点
rational choice合理的选择
rational conduct合理的行为
rational decision合理的决定
rational explanations合理的解释
rational faculty推理力
rational thought有道理的思考

经典引文

Man as a self-conscious, rational..being who can make choices.
出自：J. Plamenatz

【近义词】

sensible明智的
reasonable合理的
logical符合逻辑的
sound声音
sane心智健全的
level-headed头脑冷静的
thinking思考
realistic现实的
coherent连贯的
judicious明智的
intellectual凭理智做事者...
enlightened开明的
mental思想的
dialectic逻辑论证法
intelligent聪明的
advisable明智的
wise聪明的
lucid明白易懂的
balanced均衡的
normal正常的
cogent有说服力的
rational number[数]有理数
noetic智力的

【反义词】

irrational无理数
absurd荒唐的

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