Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
I want to cash this check, please.
我想把这张支票换成现金。
Do I have to make a reconfirmation?
我还要再确认吗？
The box is heavy. Can you carry it?
这个箱子很重，你能搬动吗？