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
I'm tired and hungry.
我累了， 也饿了。
One should not run with the hare and hunt with the hounds.
不应两面讨好。
When it is eating normally, its own training begins.
当它进食正常了，训练就开始。