You have to have a sharp knife.

你必须有一把锋利的刀。

youdao

A sharp knife makes a clean cut.

快刀切得整齐。

《牛津词典》

Take a sharp knife and cut the salmon into thin slices.

用一把锋利的刀把三文鱼切成薄片。

youdao

But a few years later, the high sharp voice of Hank Williams would cut like a knife through the music world.

VOA: special.2009.11.22

The artist uses a fine sharp knife to cut through the metal.

VOA: special.2009.09.02

"And I just take this, a good sharp whittling knife like this and cut away everything that does not look like a guitar."

VOA: standard.2010.07.06

To slice, a mandoline is ideal but a sharp knife works too.

WSJ: Paul Kahan's Shaved Brussels Sprout Salad With Burrata | Slow Food Fast

As more and more useful, content-rich cooking information for the home chef has migrated online and into apps like "Epicurious, " tablets have become as indispensable in the kitchen as a sharp knife.

WSJ: iPad as Sous Chef

Scans conducted after layers of bandages were removed revealed a deep cut in Ramesses III's throat, probably made by a sharp knife during a royal coup, according to a study published by the British Medical Journal.

CNN: Study revisits mystery of Egyptian king's killing