1
the irrationality of sth
此搭配中 irrationality 通常作不可数名词，表示某种性质或状态。
The irrationality of the decision was clear to everyone.
这个决定的不合理性对每个人来说都很明显。
无理性；不合理性
先理解核心含义，再看它在真实句子里的用法。
无理性；不合理性
the state of being irrational; lacking powers of understanding
The irrationality of the decision was clear to everyone.
这个决定的不合理性对每个人来说都很明显。
无理性；不合理性
The quality or state of being irrational.
无理性的事物；不合理、荒谬的思想或行为的结果
Something that is irrational; the result of an illogical or absurd thought or action.
The irrationality of his decision surprised everyone.
他决定的不合理性让每个人都感到惊讶。
She couldn't explain the irrationality of her fear of spiders.
她无法解释自己对蜘蛛的恐惧为何如此不合理。
We need to reduce the irrationalities in our decision-making process.
我们需要减少决策过程中的种种不合理之处。
此搭配中 irrationality 通常作不可数名词，表示某种性质或状态。
The irrationality of the decision was clear to everyone.
这个决定的不合理性对每个人来说都很明显。
irrationality 后可接 in 加名词或动名词，表示‘在某方面不理性’。
There is a certain irrationality in refusing to listen to evidence.
拒绝听取证据的做法带有某种非理性。
指具体的不合理之处时，irrationality 可作可数名词，复数形式为 irrationalities。
He spotted an irrationality in the argument.
他发现了论证中的一个不合理之处。
Not this
It is irrationality to spend all your money on games.
Use this
It is irrational to spend all your money on games.
irrationality 是名词，不能用在 be 动词后作表语；这里需要形容词 irrational（不理性的）来说明行为。
Not this
He reacted irrationality to the criticism.
Use this
He reacted irrationally to the criticism.
irrationality 是名词，动词 react 需要用副词修饰；应改用副词 irrationally（不理性地）。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
十足的非理性
The sudden cancellation of the project was sheer irrationality.
突然取消该项目纯粹是非理性行为。
人类非理性
The book examines the causes of human irrationality in times of crisis.
这本书探讨危机时期人类非理性的成因。
市场非理性
Indices can remain distorted by market irrationality for months.
指数可能在数月间因市场非理性而依然扭曲。
表面上的非理性
She tried to explain the apparent irrationality of her decision.
她试图解释自己决定表面上的不合理性。
一时非理性
In a moment of irrationality, I bought the shoes without checking the price.
一时失去理性，我没看价格就买了那双鞋。
事物的非理性并不能证明它不存在，反而是它存在的条件。
In Beyond Good and Evil, Nietzsche argues that the irrationality of a belief does not make it false, but rather explains why people hold it.
在《善恶的彼岸》中，尼采认为，一个信念的非理性并不使它为假，反而解释了人们为何会相信它。
Use irrationality naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：ir- 表示“不”，rational 是理性，-ity 是名词尾 → irrationality 就是“无理性”。
语域：formal 常见场景：academic writing、philosophy、psychology、economics 这是一个比较正式的抽象名词，通常出现在学术或书面讨论中，如哲学、心理学、经济学；日常口语里较少使用，多会说 irrational 或 not rational。
通常作不可数名词；复数形式 irrationalities 较少用，表示具体的不合理行为或想法。
Dictionary facts from ECDICT, WIKTIONARY.