steppen.(特指西伯利亚一带没有树木的)大草原;干草原
stepped shim阶梯垫
steppe fauna草原动物群
steppe slope草原坡地
stepped downv.走下;逐步;降低;辞职
stepped cone级轮
stepped horn阶梯型变幅杆
stepped lens阶梯透镜
stepped intov.进入(着手做)
stepped face台阶式工作面,梯段式工祖
stepped arch阶形拱