2--This is your first time? Wow, that's surprising.

1--How is it surprising?

2--I've just never met anyone who hasn't taken the bus before.

1--Well, now you could say you have.

2--Why are you finally taking the bus for the first time?

1--I figured it would be a good way to save money.

2--That's for sure considering the price of gas nowadays.

1--No kidding. Listen, I have a few questions about taking the bus.

2--What are they? I'm sure I could answer them for you.

1--I was wondering how often the buses pass by.

2--They usually pass by every thirty minutes, but it could vary.

===================================
注解：
 
1.save money省钱 
2.nowadays现在
3.vary变化

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

1--我以前从没有乘过公交。

2--这是你的第一次？哇，太令人吃惊了。

1--怎么令人吃惊啦？

2--我从没见过以前没有乘过公交车的人。

1--好的，现在你可以说你见过了。

2--你为什么终于第一次乘公交车了呢？

1--我想这是一个很好的省钱方式。

2--考虑到现在的油价这确实是。

1--没开玩笑。听我说，我有几个关于乘公交的问题。

2--什么问题？我确定我可以为你解答。

1--我想知道公交车多久经过一次。

2--它们每30分钟一班，但有时候也有变化。