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
Sorry, we don't have any vacancies at the moment.
不好意思，目前我们没有任何的职位空缺。
Tell me where I can post them.
请问，哪里有投信的邮筒？
This temptation to cover the distance between himself and the reader,
这种企图消除自己和读者之间距离的作法，