Praetrsonics
极超短波晶体声学, 特超声(学)
🗣️ 情景例句
I want to pick up the car tomorrow morning at seven. Are you open then?
我想在明天早上7点提车。那时你们开门了吗？
No way!
休想！
Is she very unhappy without me?
没有我在她是不是很不愉快？