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
Language is her strength, math is her weakness.
语言是她的强项，数学则是她的弱门。
Do business, but be not a slave to it.
要做事，但不要做事务的奴隶。
The best time to come to China is in spring or autumn.
到中国来，最好的时间是在春天或者秋天。