所有幸福的家庭都十分相似

All happy families are like one another; each unhappy family is unhappy in its own way.
                                                                                    -- Leo Tolstoy ,Russian writer
所有幸福的家庭都十分相似；而每个不幸的家庭各有各自的不幸。
                                                         -- 俄国文学家 托尔斯泰.L.