论文部分内容阅读
已经到来的2002年是对称年,而且与上一个对称年(1991)的“时差”最短,仅相隔11年。所谓“对称年”即这个年份的数字是左右对称的。如“2002”,“1991”即是。
The 2002 year that has come is a symmetric year, and the shortest “time difference” with the previous symmetric year (1991) is only 11 years apart. The so-called “symmetric year” is the number of this year is symmetrical. Such as “2002”, “1991” is.