part of speech(词类,词性) ：one of a group of traditional classifications of words according to their functions in context,including the noun,pronoun,verb,adjective,adverb,preposition,conjunction,and interjection,and sometimes the article.
一组传统的词语类别之一,根据它们在上下文中的功能划分,包括名词、代词、动词、形容词、副词、介词、连词和感叹词,有时还包括冠词
members of sentence：a sentenc is made of several basic parts ,so the basic parts of the sentence is called members of sentence.a member of sentence can be made of different parts of speech or phrases.The two main elements of sentence are Subject and Predicate.The main part of speech of Subject is usually made of nouns.The main part of speech of Predicate is usually made of verbs.
一个句子由各个功能不同的部分构成,这些部分叫做句子成分.句子成分可以由不同的词或词组组成.句子的直接成分是主语和谓语.主语多由名词构成,谓语多由动词构成.