I'd like to return these books.

我想还这些书。

Let me see. These books are ten days overdue. I'm sorry, but you'll have to pay a fine.

我看看。这些书过期十天了。对不起，你得交付罚金。

How much is it?

罚多少?

Just a second, please. Let me check. Comes to 4 dollars and 50 cents altogether.

请等一下，让我查查看。总共4.50美金。

overdue a.过期的，到期未付的;早该有的，迟到的

fine a.健康的;极好的的 ad.很好 vt.&n.罚款