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
It certainly is. The sun is shining but there's pleasant breeze. It's lovely.
的确不错。阳光明媚，和风宜人。太舒心了。
Boys will be boys.
孩子终归是孩子。
The second marks the arrival of transverse vibrations which travel more slowly and arrive several minutes after the first.
然后记录下的是横向波的到达，横向波比纵向波传播得慢，在纵向波到达几分钟后才能到达。