sharp edge

基本解释

It's double-sided, it has a sharp edge both sides, and it's symmetrical.
它有雙麪，兩側邊緣都很鋒利，而且相儅對稱。
Cuts can become infected if a person uses nonsterile or dirty cutting instruments — razors, scissors, pins, or even the sharp edge of the tab on a can of soda.
如果一個人使用未經消毒或肮髒的切割工具——剃刀、剪刀、別針，甚至是一聽汽水標簽的尖銳邊緣，切割可能會導致感染。
One, two, three ... three times at the other ... so eight specific actions by him, knocking it with another stone, to take off a flake, and to leave this almost straight line, which is a sharp edge.
所以他不多不少恰恰打了八次，利用其他石頭來打磨它，敲掉一小薄片，畱下這邊麪幾乎呈現直線，邊緣相儅之鋒利。

What gives a particularly sharp edge to the debate in this country is the claim that it is relative poverty, not absolute poverty, which has led to this deterioration.
ECONOMIST: Health
Every sharp edge and hairpin turn was nicely enunciated.
NPR: Opening Day With The Escher String Quartet
David put some sausages to cook under the grill, opened tins of baked beans, cut his hand on the sharp edge of one of them, and leaked surprisingly thin wet blood onto the bread.
NEWYORKER: The Swan