0 Introduction Translation is a language activity,which involves two languages and a variety of knowledge.It is the ideological content,feelings and style of a language expressed and reproduced by another language.There are many differences between two different languages,such as vocabulary,grammar structure and so on.Words can be classified as follows:nouns,verbs,adjectives,adverbs,pronouns,prepositions,conjunctions,etc.According to this,parts of speech are the core content of the