在行进

The corps marched through the desert in perfect formation.

军团以整齐的队形在沙漠中行。

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在卵石路上行所发出的噪音吗?

You are heading north.

你们在往北行。

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

疾走如飞的骏马在快速行中倒下，而赶骆驼者与骆驼缓缓而行却到达终点。