I'd like to exchange this traveler's check. 我想要兑换旅行支票。 How is the conversion rate today? 今天兑换率多少? Please exchange twenty thousand yen into dollars. 请将两万日元换成美金。 Please change ten dollar bills. 请换成十元的纸币。 Is it all right if they're all a dollar bill? 如果都是一元的纸币可以吗? Well, mix coins a little, too, please. 也换一点硬币吧。 Please break this into all fifty cent coins. 请把这个换成五十分的硬币。