gradedadj.等级的;按等级的;梯级的动词grade的过去式和过去分词.
graden.等级;年级;成绩;斜坡v.分级;评分;渐次变化
grades optimization品位优化
grade signal marker上坡信号标志
grade of metropolis都会级
graded subcoalgebra分次子余代数
graded broken stone级配碎石
grades of tax rates税率等级
grade A vehicle tax甲种车辆税
Grade of protection防护等级
grades of penalties等级
grade B vehicle tax乙种车辆税