perturbation

英 [ˌpɜːtəˈbeɪʃn]

美 [ˌpɜːrtərˈbeɪʃn]

n. 忧虑; 不安; 烦恼; 摄动; 微扰; 小变异

BNC.24447 / COCA.19948

牛津词典

noun

忧虑；不安；烦恼
the state of feeling anxious about sth that has happened
摄动；微扰；小变异
a small change in the quality, behaviour or movement of sth
1. temperature perturbations
  温度的些微变化

N-VAR （尤指不常出现的）小变化
Aperturbationis a small change in the movement, quality, or behaviour of something, especially an unusual change.
1. ...perturbations in Jupiter's gravitational field.
  木星重力场的微小变化
N-UNCOUNT （某事引起的）忧虑，不安，烦恼
Perturbationis worry caused by some event.
1. This message caused perturbation in the Middle East Headquarters.
  这则消息在中东总部引起了不安。

noun

the act of causing disorder
Synonym:disruption
a disposition that is confused or nervous and upset
Synonym:fluster
activity that is a malfunction, intrusion, or interruption
1. the term `distress' connotes some degree of perturbation and emotional upset
2. he looked around for the source of the disturbance
3. there was a disturbance of neural function
Synonym:disturbance
(physics) a secondary influence on a system that causes it to deviate slightly
an unhappy and worried mental state
1. there was too much anger and disturbance
2. she didn't realize the upset she caused me
Synonym:disturbanceupset