“双倍的”用英语怎么说？

如果他们认为你是来旅游的，他们会向你要双倍的价钱。If they think you're a tourist, they charge you double.另一方面, 贵族也必须为他们所得到的服务付出双倍的价钱.On the other hand, nobles had to pay double for the services they received.我只以两镑购得这本旧书,史密斯先生愿出双倍的价钱.I paid ...