天下之大,希奇古怪的事情总是会遇上一些,即使在日常生活中有时也能露出头来。譬如说,笔者有一位朋友,他家里的电话号码是4283761,而他的老丈人家中的电话号码却是1673824,如果从右至左读,同他的就完全一模一样了。这样的两个数字,就叫做互成回文。“天然居”是北京的一家有名茶馆,“客上 The big things around the world, strange things will always meet some, even in everyday life sometimes can show their heads. For example, I have a friend whose phone number is 4283761 in his home, and the phone number in his old wife’s home is 1673824. If he reads from right to left, he is exactly the same. Such two figures are called mutual palindromes. “Natural Residence” is a famous tea house in Beijing.