阶梯 jiētī HSK7 stepping stone Origin Definitions Defs Strokes Stroke Words Sentences Sents 阶梯教室 jiētījiàoshì lecture theater A large classroom with rows of seats rising in levels; lecture theater阶梯计价 jiētījìjià tiered pricing a pricing system where the cost changes based on the volume or quantity used; volumetric pricing; differential pricing