Concave polygon
n. 凹多边形
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
polygon
['pɔligən]
n. 多边形，多角形;龟裂状;
🗣️ 情景例句
I think I am rather outgoing. I enjoy working with others. But sometimes I'll be alone.
我想我较外向。喜欢和人合作，有时也想独处。
Kinsman helps kinsman,but woe to him that hath nothing.
亲人帮亲人，无亲来帮愁煞人。
I feel like taking a walk.
我想睡。