国际命名法则ICNP——规则与建议，第2部分 分类单元等级

Rule 5a

Definitions of the taxonomic categories will inevitably vary with individual opinion, but the relative order of these categories may not be altered in any classification.

分类类别的定义不可避免地会随个人意见而变化，但这些类别的相对顺序在任何分类中都不得改变。

Rule 5b

The taxonomic categories above and including species which are covered by these Rules are given below in ascending taxonomic rank. Those in the left-hand column should he recognized where pertinent; those in the right-hand column are optional. The Latin equivalents are given in parentheses.

上述分类类别，包括本法则所涵盖的物种，在下面以升序的分类等级给出。 左栏中的等级应该在相关的地方得到承认；右栏中的那些是可选的。 对应的拉丁文在括号中给出。

Rule 5c

A species may be divided into subspecies, which are dealt with by the Rules of this Code (see Rules 13a–d). Variety is a synonym of subspecies; its use is not encouraged as it leads to confusion, and after publication of this Code the use of the term variety for new names will have no standing in nomenclature.

一个物种可以分为亚种，由本法则的规则处理(见规则13a-d)。 品种是亚种的同义词；它的使用不受鼓励，因为它会导致混乱，在本法则发表后，新名称的品种一词的使用将在命名上没有地位。

Rule 5d

Taxa below the rank of subspecies (infrasubspecific subdivisions) are not covered by the Rules of this Code, but see Rule 14a and Appendix 10.

低于亚种（特定亚种）等级的分类不包括在本法则的规则中。