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
Hi, Mr. Stewart.
嗨， Stewart先生。
How many of these are you going to buy her?
你要买多少给她？
of supplying sufficient details to enable the thing to be constructed.
而且向它提供制造核弹的细节，