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 entirely agree with you.
你的意见我不完全同意。
Promise little but do much.
少许愿，多做事。
The house was dirty. They hadn't cleaned it for weeks.
房子很脏，他们好几个星期没打扫了。