其实 牛津-伦敦 之间火车单程 Advance的票只要4镑 that is correct but it is not always! 最简单最准确的方法，打电话到信用卡中心，他们会有明确的解释，为什么交易被拒 a very nice idea 有没有人遇到过类似的问题，我感觉这种情况应该也有人遇到过吧，请高人指点 many travellers reported this problem. however the solutions vary. I guess it could be due to you use an oversea account.
