A：Could I have my bill, please?请给我账单，好吗?
B：Certainly, sir.好的，先生。
A：I'm afraid there has been a mistake.可能这里出错了。
B：I'm sorry, sir. What seems to be the trouble?对不起，先生，请问有什么问题?
A：I believe you have charged me twice for the same thing. Look, the figure of 6.5 dollar appears here, then again here.我想你们对同一中东西收了两次费用，看6.5美元的数字在这里出现一次，然后这里又出现了。
B：I'll just go and check it for you, sir.我马上去给您核实下，先生。