Unknowns
n. 未知事件（unknown的复数）
🗣️ 情景例句
Well, it's small, but clean.
噢， 它是小了点， 但是干净。
To watch the accident
观察意外事故的现场
I will never forget the days that I spent with you.
我永远都不会忘记和你一起度过的日子。