edges of都有哪些中文含义呢？急！！！

某某边缘
某一极端~

例如刀锋

Please sharpen the edge of this axe.
请把这把斧头的刃磨快。
Her pupils often got the rough edge of her tongue when they disobeyed her.
学生不听她的话时，常遭到她粗暴的申斥。

边缘

....的边缘