名词 steppe:

1. extensive plain without trees (associated with eastern Russia and Siberia)

steppen.(特指西伯利亚一带没有树木的)大草原；干草原stepped hole阶梯孔stepped roll阶梯轧辊stepped slit阶梯狭缝steppe scrub干草原灌丛stepped cost台阶式成本stepped gear分级齿轮,塔齿轮,阶式齿轮stepped beam阶形梁stepped drum阶式鼓轮stepped ramp阶形坡道stepped roof阶形屋顶