1·Subject, predicate, object, objective complement, attribute, adverbial modifier, predicative, appositive.
主语，谓语，宾语，宾语补足语，定语，状语，表语，同位语。
2·An appositive is a noun or pronoun that renames another noun or pronoun. Appositives are placed directly after the noun or pronoun they identify.
同位语为名词或代名词，同位语直接放在想定义的名词或代名词后面。