A zero friction coefficient means that no shear forces will develop and the contact surfaces are free to slide.

零摩擦系数意味着没有剪力发生，且接触面自由滑动。

youdao

The coefficient of friction for that same tire in mud would be almost zero.

同样的轮胎在泥泞的地面上，其摩擦系数可能几乎为零。

youdao

In the latter case, the coefficient of the friction must be zero.

在后一种情况下，摩擦系数必须为零。

youdao

Instead, the company's selling SteornLab testing equipment to other organizations working on magic fairy-power rotary and magnetic systems, and it's also got plans to sell something called "ZeroF passive magnetic bearings" later this year -- we'd assume ZeroF means "zero friction, " which is nicely impossible and totally in line with basically everything Steorn stands for.

ENGADGET: Steorn returns, promises to open Orbo specs, give you a pony