Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
Well, it's done. Tomorrow morning at a publisher's office.
好了， 事情办成了。明天早晨要到出版社老板的办公室。
Try (your friend) before you trust him.
朋友要经考验，才能取得信任。
Suddenly someone shouted.'It's two minutes past twelve! The clock has stopped!'
“已经12点零2分了！那钟已经停了！”