Retractability
n. 收缩核
🗣️ 情景例句
Mr. Malcolm Stewart, and it looks like a personal letter.
Malcolm Stewart先生收 ，而且看来是一封私人信件。
What's the height of the building?
这座楼有多高？
That'll be very intersting. What cities are you going to visit?
那一定很有趣。你们打算参观哪些城市？