Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
This time draft will fall due at the end of this year.
这张期票年底到期。
My brother is two years younger than I am.
我的兄弟比我年轻2年。
Really? You came at a bad time of year, I'm afraid!
真的？恐怕你来的不是时候。