" This way, " one of the Fremen said, and he led them down rock steps into darkness.
“这边走，”一个弗雷曼人说，然后他领着他们走下石阶，进入黑暗。
英语百科
Rock step
Rock step (also called break step) may refer to one of similar dance moves. The name refers to the rocking action during the move: the weight is transferred from one foot to another and then back. It is used in a number of dances, such as East Coast Swing, Zydeco, Lindy Hop, Tango.