Linac
[化] 直线加速器
🗣️ 情景例句
I can't drive a car, but I have a motorbike license.
我不会开汽车，但我有摩托车的驾驶执照。
I would like to talk with someone in charge.
我想请你们负责人讲话。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。