Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
That'll be fine.
就这样说定了。
Wisdom is more to be envied than riches.
才智比财富，令人更可羡。
As the Maori had no written language, the stories of Maori history were handed down from generation to generation.
由于毛利人当时没有书面语，毛利人的历史故事是一代一代传下来的。