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
Always got something to say.
总有话要说。
Could you drop me off at the airport?
你能载我到机场吗？
At lunchtime, the tourist thanked him and gave him ten pounds, which was a lot of money in those days.
午餐时，这位游客向他表示感谢，并给了他10英镑。这在当时可算是一大笔钱了。