2--Where do you need to go?

1--I have to go to the Los Angeles Library.

2--You need to buy a buss pass, that's for sure.

1--I don't know where to buy it.

2--You've never purchased a bus pass?

1--I wouldn't be asking if I did.

2--It's easy to buy a bus pass. All you have to do is get on the bus and ask for one。

1--It's that easy? Are you sure?

2--Don't you believe me?

1--I do, but I thought it would be more complicated than that.

2--There are other places where you can buy them.

1--I think I'll just buy the pass on the bus.

2--Alright, suit yourself. And you're welcome.

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注解：
 
1.bus pass公交卡
2.purchased购买
3.complicated复杂

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译文：

1--我需要买一张公交卡。

2--你要去哪？

1--我要去洛杉矶图书馆。

2--你确实需要买一张公交卡。

1--我不知道在哪买。

2--你从没买过公交卡吗？

1--如果我买过的话我就不会问了。

2--买公交卡很容易。你只需要上了公交车然后要一张。

1--这么简单？你确定吗？

2--难道你不相信我吗？

1--不是，我以为比这复杂。

2--也有别的地方可以买到公交卡。

1--我想我会在公交车上买一张。

2--好的，你随意。不客气。