eg,1) They have many things in common他们有很多共同点。 2)Although they are twin brothers, they have nothing in common 虽然他们是双胞胎,但是他俩毫无共同之点。 07 ?, 3. be known as.: be regarded as. , have the reputation of being g1) He is known as an excellent singer他以优秀的歌唱家闻名。⌒ 2)The West Lake in Hangzhou is known as the paradise on earh杭州西湖以人间天堂而闻名天下 be known to.. be familiar to..为.所熟知 e.g. He is known to everyone 大家都认识他。 4 nucleus fam核心家庭 Back ground knowled ge: American families. known as nucleus families, belong to the Western type and consist of parents and their children. But most Chinese families are extended families. with three or more generations living togethere.g. 1) They have many things in common. 他们有很多共同点。 2) Although they are twin brothers,they have nothing in common. 虽然他们是双胞胎，但是他俩毫无共同之点。 3. be known as…: be regarded as…, have the reputation of being e.g. 1) He is known as an excellent singer.他以优秀的歌唱家闻名。 2) The West Lake in Hangzhou is known as the “paradise on earth”.杭州西湖以人间天堂而闻名天下。 be known to…: be familiar to… 为…所熟知 e.g. He is known to everyone. 大家都认识他。 4. nucleus family 核心家庭 Background knowledge: American families, known as nucleus families, belong to the Western type and consist of parents and their children. But most Chinese families are extended families, with three or more generations living together