Concavities
n. 凹面, 成凹形( concavity的名词复数 )
🗣️ 情景例句
Yeah. What's the bet?
好啊， 赌什么？
I'm impressed by your approach to business.
你们经营业务的方法给我留下了很深的印象。
I'm doing some washing and John is cooking dinner.
我正在洗衣服，约翰在做晚饭。