短語(yǔ)詞組短語(yǔ)conditional permutable 條件置換permutable band 同余交換帶permutable congruence 可換同余permutable e 能交換的permutable hierarchy 釋義可置換譜系conditionally permutable 條件置換permutable semigroup 同余交換半群permutable subgroups 交換子群 返回 permutable