Convexo-concave
a. 一面凸一面凹的\\n[建] 凸凹的
🧩 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
Blackjack.
二十一点！
He who pleased everybody died before he was born.
众口难调。
How do you want your steak?
你的牛排要几分熟？