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
The village was filled with people--the weather was so nice.
镇上挤满了人--因为天气好的缘故。
I got sick and tired of hotels.
我讨厌旅馆。
Is it expensive to hire a car?
租车贵不贵？