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
He grew up happily in a small village.
他在小村庄里快乐地长大。
The pine tree has a very wide distribution.
松树的分布很广。
What's your goal in life
你的人生目标是什么？