2--How often do I have to do that?
 
1--Once every two months.
 
2--That's a lot.
 
1--What do you mean?
 
2--That's six times a year!
 
1--Yes, and it takes about five minutes each time.
 
2--I'll try.
 
1--Check your tires or you'll get a flat.
 
2--Oh. That's not good.
 
1--No, it isn't. A flat costs you time and money.
 
2--And I don't have either.
 
===================================
注解：
 
1.put air in给...充气   
2.each time每次        
3.costs费用     

===================================
译文：

1--记得把你的轮胎充满气。
2--我需要多久充一次？
1--没两个月一次。
2--这么多。
1--你的意思是？
2--那意味着每年六次！
1--是的，每次需要大约5分钟。
2--我会试试的。
1--检查你的轮胎不然你的轮胎会漏气。
2--噢。那很不好。
1--不，不是。漏气的轮胎费钱又费时间。
2--而且这两者我都没有雨。