Concave line
[计] 凹线
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
line
[laɪn]
n. 线条;排;行列;界线;
vt. 排队;用线标出;沿…排列成行;给…安衬里;
vi. 形成一层;排队;击出平直球;
🗣️ 情景例句
She's worked two jobs for years.
几年来他一直同时做两个工作。
But it's supposed to get cloudy and windy again this afternoon.
但是，据说今天下午又要转阴刮风了。
How did the game turn out?
球赛结果如何？