in a state of derangement
常指精神或心理上的紊乱。
The patient was in a state of derangement.
病人处于精神错乱状态。
精神错乱
derangements — plural of derangement
精神错乱的状态；扰乱的行为或实例；一种排列方式,使得没有元素在原来的位置上；捣乱；紊乱
a state of mental disturbance and disorientation
精神错乱的状态
The property of being deranged.
扰乱的行为或实例
An act or instance of deranging.
一种排列方式,使得没有元素在原来的位置上
A permutation of a set such that no element is in its previous position.
After weeks without sleep, his sudden derangement worried the whole family.
连续几周不睡觉后，他突然的精神错乱让全家人非常担心。
用法提示：derangement 是名词，表示精神错乱的状态。
Doctors could not explain the patient's brief derangement during the fever.
医生无法解释病人在发烧期间短暂的意识混乱。
用法提示：derangement 在此句中作宾语，指暂时的精神紊乱。
The novel describes a man's slow descent into derangement after losing his job.
这部小说描述了一个男人失业后逐渐陷入精神错乱的过程。
用法提示：derangement 用于“陷入精神错乱”的语境，是名词，表示精神失常状态。
常指精神或心理上的紊乱。
The patient was in a state of derangement.
病人处于精神错乱状态。
用于描述长期的或突发的精神紊乱。
He suffered from severe derangement after the accident.
事故后他患有严重的精神错乱。
数学术语，指排列中每个元素都不在原位的排列。
The derangement of 5 elements is a common problem in combinatorics.
5个元素的错位排列是组合数学中的常见问题。
grammar · medium
易错句子The crisis derangement the company.
正确表达The crisis deranged the company.
英语中'derangement'是名词，不能直接用作动词。表示'使精神错乱或混乱'应用动词'derange'。
grammar · medium
易错句子We need to calculate the number of arrangements where no element is in its original position.
正确表达We need to calculate the number of derangements where no element is in its original position.
在组合数学中，'arrangement'指一般的排列，而'derangement'特指错位排列（无固定点），二者意义不同，混淆会导致数学概念错误。
derangement 指精神错乱或混乱状态，而 arrangement 指有序的安排或布置，前缀 de- 表示相反或去除。
derangement 多指精神上的紊乱，而 derailment 字面意思是火车脱轨，比喻计划或进程的突然中断。
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