Reentrant polygon
凹多边形
🧩 词语组成解析
reentrant
[ri:'entrənt]
n. 再进去，凹角;
adj. 再进去的，凹角的;
polygon
['pɔligən]
n. 多边形，多角形;龟裂状;
🗣️ 情景例句
How do you stay so young-looking?
你怎样保持如此年轻的？
Ignorance is bliss.
眼不见为净。
When everyone had taken his/her place, the lawyer spoke as follows.
当大家都入座以后，律师作了如下的发言