Key Notes:
1. settle v. 结清，还清
e.g. The insurance company settled the claim quickly and for the full amount of the claim.保险公司迅速解决索赔，而且是全额赔款。?
settle up: 结帐，偿债
e.g. He settled up with the waiter after a meal.他用餐后和侍者结帐。
You bought the tickets and I paid for the meal ，Shall we settle up now?
. 你买了票，我付了饭钱，我们现在算一下帐吧。
2. credit card: 信用卡
credit n. 1）信用，信赖 credit account: 信用帐户，记帐户头
e.g. George has credit with his teacher. 乔治深受老师的信任。
2)（个人经济上的）信誉
His credit at the bank is good. 他在银行的信誉良好。
3) 学分
I don’t have enough credits to graduate. (我学分不够不能毕业)