名词作前置定语一般应用单数形式 ,但如用其单数形式会产生歧义或难以表达多重性和类属性时 ,则应采用复数形式。名词中心词由两个或以上成分组成时 ,限制了of短语的选用。非中心名词是并列的或有较长后续成分时 ,限制了属格的选用 ;名词短语内各个成分的次序安排主要受到句子结构的语体标准和末端中心原则的影响 Nouns as antecedents generally apply singular forms, but if its singular form will be ambiguous or difficult to express multiple and class attributes, it should be used in the plural form. When a noun center consists of two or more components, the choice of the phrase is limited. Non-central nouns are juxtaposed or have long follow-up components, which limits the choice of genus. The order of each component in the noun phrase is mainly influenced by the standard of the sentence structure and the principle of the terminal center