小心那个打开的罐头——它的边缘很锋利。

Be careful with that opened tin can - it has a very sharp ___edge.

他的手指被塑料椅子破损的边缘割伤了。

He cut his finger on the broken ___edge of the plastic chair.

一把好的厨刀应该有一个完美打磨过的刃口。

A good kitchen knife should have a perfectly honed ___edge.