credit card system

例句：

1. 1.The credit card system is designed to simplify the process of making purchases.
   信用卡系统旨在简化购物过程。
2. 2.The bank's credit card system allows customers to make purchases online.
   银行的信用卡系统允许客户在线购物。
3. 3. The credit card system has made it easier for people to manage their finances.
   信用卡系统使得人们更容易管理财务。