Concave point
[计] 凹点
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
🗣️ 情景例句
When does he arrive?
他什么时候到？
What's the size of your shoes?
你的鞋多大尺寸？
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。