等级，同类类别或集团，尤指包含在一数目或级别的序列之中，作为按相同税率征税的收入类别 A classification or grouping, especially within a sequence of numbers or grades, as a category of incomes sharing the same tax rate.
在生物群落中影响其它类别的存在和类型的 Influencing the presence and type of other species in the community.
小（项）的；小前提的与一个更严格的类别有关的 Dealing with a more restricted category.
分类，类别分类，尤指受过度限制分类 A category, especially an overly restrictive one.