steppen.(特指西伯利亚一带没有树木的)大草原;干草原
Stepped dosage阶梯剂量
stepped leader梯级先导
stepper motors步进电机
Steppe polecatn.艾鼬
steppe culture草原文化
stepped quarry阶段采石场
stepper module步进块
steppe ecology草原生态
steppe climate草原气候
stepped cutter多联齿轮铣刀