Looks as if it was made by a sharp edge of something in metal.

看起来好像是什么金属东西的锋利边缘割的。

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Be careful—it has a sharp edge.

小心点—这刀刃很锋利。

《牛津词典》

This picture echoes an old Chinese poem: Sharp edge of a sword comes out from grinding, and plum blossom's fragrance comes from the bitter cold.

这张照片和一首中国古诗产生了共鸣：宝剑锋从磨砺出，梅花香自苦寒来。

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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