liping is twelve years old,but he has only three birthdays.why?

问题描述:

liping is twelve years old,but he has only three birthdays.why?

李平十二岁,但他只过了三个生日,为什么呢?
Because he was born on February 29th in a leap year.We only have one February 29th every four years.
因为他出生在闰年的二月二十九日.每四年过一次生日.