级: level; rank; grade分: component级分隔: a class division; b class division亚级分: subfraction; subracacation等级分配;年级分配: grade distributionn级分辨率: n-level of resolution按等级分类: astm)30classification by rank按等级分析: coal analysis by rank按煤级分类: classification by rank病因级分: etiologic fraction层级分离: separation of levels层级分析: hierarchical analysis初级分离: first order segregate初级分离子: first order segregant; first-order segregant次级分岔: secondary bifurcation次级分离: second-order segregation; secondary segregation次级分离子: second order segregant; second-order segregant次级分裂: secondary cleavage次级分水岭: subordinate divide粗粒级分析: coarsefraction analysis单级分离: one steseparation; single stage separation等级分布: ranked distribution等级分界: specification break等级分类: grade separation; ordinal scale; ordinalscale等级分数: rating fraction