They are just 80 atoms thick on their cutting edge - around 1/10,000th or 5,000 times thinner the width of a hair and far sharper than any of common blades on the market.

刀锋的厚度仅相当于80个原子，即发丝直径的五千分之一到一万分之一左右，比市场上的普通刀片要锋利非常多。

youdao

Shear force is interrelating with width and thickness of plate and obliquity of knife-edge.

斜刃剪切时，剪切力的大小与板料的宽度、厚度及斜刃倾角有关。

youdao

Abstract: shear force is interrelating with width and thickness of plate and obliquity of knife-edge.

文摘：斜刃剪切时，剪切力的大小与板料的宽度、厚度及斜刃倾角有关。

youdao

Visitors can see the falls from many vantage points: above from a helicopter or microlight fixed wing plane, at eye level walking across the Knife Edge Bridge that spans the width of the falls on the Zambian side, or from below on a hike.

BBC: Livingstone��s Zambia