【Again and again, in the postwar years, Twain seemed forced to deal with the challenge of race. Consider the most controversial, at least today, of Twain’s novels, Adventures of Huckleberry Finn. 】Only a few books have been kicked off the shelves as often as Huckleberry Finn, Twain’s most widely read tale. Once upon a time, people hated the book because it struck them as rude. Twain himself wrote that those who banned the book considered the novel “trash and suitable only for the slums（贫民窟）.” More recently the book has been attacked because of the character Jim, the escaped slave, and many occurences of the word nigger.（The term Nigger Jim, for which the novel is often severely criticized, never appears in it.）
请分析【】里的2个句子结构，并标准翻译，觉得很乱。谢谢