Multiply $3 by the more than 5 billion magstripe credit and prepaid cards in circulation in the U.S.
美国现在流通中的磁条信用卡和储值卡超过50亿张，我们可以用这个数字乘以3美元。
2
The number of credit CARDS in circulation has declined by almost a fifth.
流通中的信用卡数量也下降了将近五分之一。
3
The bank said the circulation of its dual-currency credit card reached 10 million by the end of 2006, a jump of 100 percent from 2005, and accounted for 35 percent of the credit card market in China.