Bicycle chain drive的意思|示意

Like the minimalist theft-proof bicycle by Chris Boardman, the Nulla has no hubs or chain drive for perhaps the sleekest, most futuristic look yet.

就像Boardman的最简防偷自行车，这辆车也没有拉幅和传动链，这也是它看起来超现代的原因。

The key is there are a speed rate between front wheel and back wheel to the chain drive of common bicycle, what of you design ?

关键是普通自行车的链传动前后有个齿轮的速比，你这个是多少？

You cannot drive a motor bike like a bicycle, nor can you manage a supermarket chain like a market stall.

您不可能驾驶一辆摩托车像骑自行车一样，亦不能管理一间连锁超市像管理市场摊位一样。