A sharp blade is likely to nick the skin and draw blood.

锋利的刀刃可能会划破皮肤，引起出血。

《柯林斯英汉双解大词典》

The youth like the early spring, like the morning sun, like the budding flowers, like the sharp blade fresh off the grinding stone.

青春如初春，如朝日，如百卉之萌动，如利刃之新发于硎，

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Sharp blade, sharp mind.

锋利的刀，敏锐的头脑。

youdao

Prosecuting counsel Karim Khalil QC had told the court Mr Reeve was savagely beaten and his face and torso scored with a sharp blade.

BBC: Kelly, left, and Jodie Barnes

He told the court Mr Reeve "was brutally beaten, cut with a sharp blade and left to die in his home, unable to summon help".

BBC: Barry Reeve

To prepare the beets, peel them and shave them on a mandoline, or slice them into very thin rounds using a knife with a fine, sharp blade.

WSJ: Sean Brock's Beet, Strawberry and Sorrel Salad | Slow Food Fast