Moreover,the type of the text can also be classified into:literary and non literary,that is: literary:novel,biography,prose,poem, anecdote,joke,etc. non literary (practical):government's document, diplomatic document,legal document,scientific and technological material,business letters, public notice,product instruction,advertisement, name card and tourist catalogs,etc. Moreover, the type of the text can also be classified into: literary and non literary, that is： • literary：novel, biography, prose, poem, anecdote, joke, etc. • non literary (practical): government’s document, diplomatic document, legal document, scientific and technological material, business letters, public notice, product instruction, advertisement, name card and tourist catalogs, etc