在行进

You are heading north.

你们往北行。

Can you imagine the racket made by a line of empty trailer trucks rolling along cobblestone streets?

你能想象出一队空的拖车卡车卵石路上行所发出的噪音吗?

A galloping horse falls down when it's running to the destination, while the cameleer and the camel reaches it slowly.

疾走如飞的快行下，而赶骆驼者与骆驼缓缓而行却到达终点。