2--Why is that, Mr. Williams?

1--By pre-qualifying, you know beforehand which house you can buy.

2--I thought I would look at houses first.

1--That's okay too, but you may be wasting your time.

2--How so, Mr. Williams?

1--You may find a house you really like, but can't afford it.

2--Well, that's when I'll negotiate with the seller.

1--Yes, that's true, but by pre-qualifying, you'll save time, and effort.

2--How is that?

1--You will be able to select a home you know you can afford.

2--Okay. Then we'll try it your way.

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注解：
 
1.pre-qualified提前预估 
2.beforehand事先 
3.select挑选

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译文：
 
1--买房的最佳方法是通过提前预估,安德森女士。

2--为什么是那样，威廉姆斯先生?

1--通过提前预估，你事先知道你可以买哪所房子。

2--我想我要先看看房子。

1--那也可以，但你可能会浪费你的时间。

2--怎么说呢，威廉姆斯先生？

1--你会发现一个你真的喜欢,但买不起的房子。

2--好的，那时我会和卖主谈判的。

1--是的，确实可以，但通过提前预估，你可以节省时间和精力。

2--怎么节省？

1--你可以选一个你能支付的起的房子。

2--好的。那我们按你说的做。