Concave polyhedron
凹多面体
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
n. 多面体
🗣️ 情景例句
I didn't expect you to do such a good job.
没想到你做得这么好。
Skiing is such a difficult sport that it's more work than play.
滑雪是非常困难的运动，真所谓工作高于游戏呀。
the plentiful supply of food thrown overboard by the crews on the rigs;
钻井平台工作人员抛到海里充足的食物；