Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
OK. I'll be back in a few minutes.
好，过几分钟我就回来。
Frugality is an estate alone.
仅仅节约就是一笔财产。
They've got some beautiful pigs.
他们有一些漂亮的猪。