Perturbations
(perturbation 的复数) n. 不安, 扰乱, 紊乱, 烦扰\\n[化] 摄动; 微扰
🗣️ 情景例句
Yes, of course.
是的， 当然。
Since we need the goods urgently, we must insist on express shipment.
由于我方急需这批货物，我方坚持使用快递装运。
That's not allowed. Once you are in here, listen to your teacher.
那是不允许的。一旦进来了，你们要听老师的话。