阶级式 Traditional form: 階級式 Pinyin (reading): jiējíshì Definitions: hierarchical Characters: 阶 - stairs, steps; degree, rank 级 - level, rank; class, grade 式 - formula, pattern, rule, style, system Traditional characters: 階 - stairs, steps; degree, rank 級 - level, rank; class, grade 式 - formula, pattern, rule, style, system