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列夫·托尔斯泰《安娜卡列妮娜》一书的开头这样写道:幸福的人大致都是相似的,而不幸的人各有各的不幸。
At the beginning of the book, Anna Karenina, Lev Tolstoy wrote: "People who are happy are generally similar, and those who are unfortunate have their own misfortunes.