Buy a MP4

买了个MP4

May I help you?

能帮您忙吗？

I bought the MP4 in your store a week before, but it doesn't work today.

我上周在你们店里买了个MP4，可是今天却不能用了。

Have you brought your receipt?

您带来收据了吗？

Yes. Here you are.

带了，给你。

I'm sorry. We will change yours for a new one.

抱歉，我们会给你换一个新的。