Oh and don't forget a castor (something low friction that drags).

哦对了不要忘了你还需要一个小脚轮(必须是摩擦力小的)。

youdao

They often have interesting properties, such as poor heat conductivity (which makes them good insulators) and low friction (which makes them slippery).

它们拥有很有趣的特点，例如导热性差(可以做很好的隔热材料)，以及低阻力(意味着表面很滑)。

youdao

And more significantly, it has very low friction coefficient and nice self-lubricating properties.

更有意义的是它具有超低的摩擦系数和优良的自润滑性能。

youdao

When a spinning ball hits a low friction surface such as grass, it will continue to spin.

BBC: SPORT | Tennis | Rules and Equipment | On the rebound

They often have interesting properties, such as poor heat conductivity (which makes them good insulators) and low friction (which makes them slippery).

ECONOMIST: The 2011 Nobel prizes

That has already begun, in the sense that apps developer communities are very low friction forms of commerce, a topic Nick Vitalari and I addressed in The Elastic Enterprise.

FORBES: What Apple and Other Trusted Brands Must Do Next