[化] 摄动; 微扰

1. an unhappy and worried mental state

<noun.state>
there was too much anger and disturbance
she didn't realize the upset she caused me

2. (physics) a secondary influence on a system that causes it to deviate slightly

<noun.phenomenon>

3. activity that is a malfunction, intrusion, or interruption

<noun.event>
the term `distress' connotes some degree of perturbation and emotional upset
he looked around for the source of the disturbance
there was a disturbance of neural function

4. a disposition that is confused or nervous and upset

<noun.attribute>

5. the act of causing disorder

<noun.act>