krawędź tnąca на английском языке:

Because I think we have to stay at the cutting edge.

lay / be at the cutting edge of sth

This young designer is at the cutting edge of a new fashion trend. Children are not allowed to touch the cutting edges of knives.

This is a cutting edge movie for the whole film industry. This cutting edge technology has won itself a lot of supporters.

This smartphone has been equipped with a cutting edge camera.