所有的名词，无论是简单或复杂的，后面可以跟着一个或多个后缀。
All nouns, whether simple or complex, may be followed by one or more suffixes.
普遍是因为英语是典型的具有曲折变化的语言，动词添加后缀或者零后缀可实现为名词。
The popularity lies in the fact that English is a typical language undergoing inflectional changes. The addition of suffix realizes the transformation of verbs into nouns.
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