Is Mark Twain a racist or a realist? Using "Huckleberry Fin" as primary example and Mark Twain's collected speeches as supporting example, discuss the seemingly racist element in Mark Twain's literary works in the context of the author's progressive personal ideas and the societal conventions of the time.马克吐温作品中不乏有严重种族歧视色彩的文字, 讨论是否这表示作者歧视黑人.网上有这方面的英文论文可以参考.