Unknowns
n. 未知事件（unknown的复数）
🗣️ 情景例句
Yes. I have a room booked with you, for three days starting today. Name of Lu, L-U.
是的，我已向你们订了房间，从今天开始，共三天。姓陆，L-U。
It is too late to come with the water when the house is burnt down.
马后炮。
Do what he or she tells you to do.
听从老师的教导。