The diagram below illustrate the process of payment by credit card.
思路分析：大家可以看一下这个图，上面用箭头很清晰指示出顾客在使用信用卡购物时，顾客开户行与商家开户行，顾客与商家与银行之间的授权与被授权等发生的一系列的联系。
雅思在线学习参考范文：
This diagram shows the different stages in the process of making a purchase with a credit card. We can see that it is a complex transaction with no fewer than five different parties involved and there are seven different steps until the merchant receives payment.