part of speech

When transformation of parts of speech takes place, we should distinguish synchronism from diachronism, grammar from rhetoric anti fixity from temporariness.

摘要转类，应当区分历时和时、语法和修辞学、固定和临时。

According to the confluction between part of speech and the implied keywords of the title,combined the subject and contend,to extract the keywords and Abstract.

词现基础上,通过融合词和标题隐含关键词信息,将主题与内容相结合,来提取关键词和摘要。