Be careful—it has a sharp edge.

小心点—这刀刃很锋利。

《牛津词典》

But natural selection swings a sharp edge, and the teen's sloppier moments can bring unbearable consequences.

但是，自然选择是把双刃剑，青少年的草率会带来令人无法承受的后果。

youdao

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.

如果一个人使用未经消毒或肮脏的切割工具——剃刀、剪刀、别针，甚至是一听汽水标签的尖锐边缘，切割可能会导致感染。

youdao

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

Her skates are chunks of steel as long as 13 feet (the crew changes skate length according to ice conditions), with an almost imperceptible curve along the bottom and a razor-sharp edge so that the skate bites hard into the ice.

FORBES: Shiver Me Timbers