Abstrusity
n. 难解, 深奥
🗣️ 情景例句
That's five points.
五分。
What time do you finish your work?
你什么时候下班？
No, not any more. It used to be free but now you have to pay to get in.
不，不再免费了。过去是免费，可现在得付钱才能进去呢。