Undular
a. [物](水跃)波形的
🗣️ 情景例句
First word ...
第一个字……
Let's stop here and continue in about 10 minutes.
我们暂停一下，10分钟后继续。
Get him his change! It's easy to say, sir; but look at the bill yourself.
给他找钱！先生，说的倒轻巧，您自己来看看这张票子吧。