他们中会有一人看着后面的路，提醒我们注意过来的车辆。One of them would keep a look-out on the road behind to warn us of approaching vehicles.然后,她伸出一只粗壮的手臂拦住后面的人, 队伍停了下来.Then she interposed a stout arm, and the line halted, with six men on the step...

“后面的”的英语可以翻译为：ack，hinder，[计] posteriori，posterior，after ...