Unknowns
n. 未知事件（unknown的复数）
🗣️ 情景例句
I've got to start thinking about college soon.
我很快也得开始考虑大学的事了。
Where are the stairs?
楼梯在哪里呢？
While on a walking tour with his wife,
一次，他与妻子徒步旅行。