Cdh
abbr. constant differential height 常微分顶点
🗣️ 情景例句
She has the ability to speak English fluently.
她能够流利地说英语。
Lovers live by love,as larks live by leeks.
情侣靠爱情生活，正象云雀靠韭葱生活一样。
They look very uncomfortable.
这种鞋子看上去很不舒适。