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
No. I'm scared to death.
不。我害怕得要命。
What is the total circulation of this journal.
这份报刊总发行量多少？
His words are strongly impressed on my memory.
他的话深深地铭记在我的心头。