Unflatness
不平直度
🗣️ 情景例句
I will, but I'll probably call too.
我会写的，我或许也会打电话。
No safe wading in an unknown water.
未知水深浅，涉水有危险。
Great. Would you please let me know when you have a race?
太好了。请告诉我你们什么时候比赛，好吗？