Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
Oh, it's going to be all right.
不会有问题了。
You have your point of view,and I have mine.
你有你的观点，我有我的。
I can't do that, Mr Tiger, said the monkey.
“我不能这么做呀，老虎先生，”猴子说