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 don't think anyone would disagree.
我想没人会反对。
His friend was filled with joy over the good news.
他的朋友因得知这个好消息而雀跃。
Many of the cars broke down on the course and some drivers spent more time under their cars than in them!
很多汽车在途中就抛了锚，而有些驾驶员花在汽车底下的时间比坐在汽车里面的时间还长。