Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
And very much in love.
而且相爱至深。
Easier said than done.
说时容易做时难。
Mary and her husband Dimitri lived in the tiny village of Perachora in southern Greece.
玛丽与丈夫迪米特里住在希腊南部一个叫波拉考拉的小村庄里。