Simple enumerations should be named with singular nouns or noun phrases 简单枚举应以单数的名词或名词词组命名。
Words and expressions importing the masculine gender include the feminine , and words and expressions in the singular include the plural , and vice versa 意指男性的字及辞句亦包括女性,而以单数表达的字及辞句亦包括双数,反之亦然。