With multi-level collation, entries are first compared in their primitive forms with their cases and diacritics ignored. If they evaluate as the same, their diacritics are taken into account for the second-level comparison. If they still evaluate as the same, their cases, character widths, and Japanese Kana difference are considered for the third-level comparison.
可应用多级对照。使用多级对照时，先比较条目的基本形式，而忽略其大小写和变音符号。如果它们的值相同，则在二级比较中考虑其变音符号。如果它们的值仍然相同，则在三级比较中考虑其大小写、字符宽度和日文假名差异。