Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
For a house.
为了房子。
One today is worth two tomorrows.
今天一天抵明天两天。
The eraser goes from one student to another first one way, then another.
橡皮擦从一个学生传给另一个学生－先从这个方向传过去，然后返回来。