perturbation

名词 perturbation:

1. an unhappy and worried mental state
   同义词：disturbance, upset
2. (physics) a secondary influence on a system that causes it to deviate slightly
3. activity that is an intrusion or interruption
   同义词：disturbance
4. a disposition that is confused or nervous and upset
   同义词：fluster
5. the act of causing disorder
   同义词：disruption

per.tur.ba.tion

n.（名词）

The act of perturbing.
情绪不稳，心神不宁：焦虑烦恼的行为
The state of being perturbed; agitation.
搅乱，混乱：处于不安的状态；动荡

A small change in a physical system.
微扰：物理体系中的微小变化
Physics Astronomy Variation in a designated orbit, as of a planet, resulting from the influence of one or more external bodies.
【物理学】 【天文学】 微扰，摄动：在固定轨道中的变化，如行星，由一个或多个外部物体的影响引起

【引伸】
per.turba.tional
adj.（形容词）