Concave function
[计] 凹函数
🧩 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
I would like to buy some stamps, please.
我想买些邮票。
Our family always has a traditional Christmas.
我们家每年都要庆祝传统性的圣诞节。
After a pause he continued his story.
停顿一下之后他继续说他的。