https://online2.tingclass.net/lesson/shi0529/0009/9870/135.mp3
https://image.tingclass.net/statics/js/2012
Smith: How much can I change 100 dollars for?
史密斯：100美元可以兑换多少钱?
Clerk: What kind of currency do you want?
职员：要哪种货币?
Smith: how much will it be in Chinese currency?
史密斯：换人民币多少钱?
Clerk: That’s 680 Yuan.
职员：680元
