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
What does your father do?
你父亲从事什么职业？
That's a liberal point of view.
那是一个开明的观点。
The assistant who served her did not like the way she was dressed.
接待她的售货员不喜欢她的那副打扮，