All my bags are checked in. I guess I'm all set to go.

我的行李都检查完了，看来我可以走了。

I'm having some trouble keeping food down.

我吃东西时感到困难。

Five hundred dollars, please. And could you give me ten dollar in small change?

请换500美元。再另外能否给我10元的小面额零钱？

How long are you going to stay here?

您在这里呆多久？

Your room number is 512. Here's your key.

房间号码是512。这是您的钥匙。

That's for a long distance call you make two nights ago.

这是你两天前打的一个长途电话的费用。