Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
Will you come over to help me with the tough job?
您能否来帮助我做这项艰苦的工作？
I'm the darkest man in my team.
我是我的那一队伍中最黑的男人。
How time files! More than a week has passed already!
光阴似箭！已经过了一周多时间了！