eg.①本文提出介绍付论 NN( Passive) Something is presented/proposed/ introduced/proved(in this paper √ This paper presents X I present.. in this paper ②这是一个人们感兴趣的问题 ③“我”“我们”一> the author(s)eg. ①本文提出/介绍/讨论··· ··· √ √ √ I present … in this paper. ② 这是一个人们感兴趣的问题 ③ “我”“我们”─> the author(s) This paper presents … … Something is presented/ proposed/ introduced / proved (in this paper) ( Passive) ╳