I am four years old at home,and two and a half in a bus and a train.

问题描述:

I am four years old at home,and two and a half in a bus and a train.

“我在家里是4岁,在公交车和火车上是两岁半.”
这应该是一篇短文中一四岁小孩说的话吧!
(4岁小孩要买半票,而两岁半就不用买票.小孩的妈妈为了逃票,所以教小孩在公交车和火车上要说自己两岁半,而实际小孩是4岁.)