他们可以为了方便而使用信用卡。

They may use a credit card for convenience.

《柯林斯英汉双解大词典》

你将需要一些当地的货币现金，但也可使用信用卡。

You'll need some cash in local currency but you can also use your credit card.

《牛津词典》

虽然有钱人可能为了方便而使用信用卡，他们从来不让利息费累积。

While they may use a credit card for convenience, affluent people never let interest charges accrue.

《柯林斯英汉双解大词典》

But in society today, and we'll talk a bit about security topics -- and such throughout the course, for cryptography -- for encrypting things like your credit card information and bank accounts -- you don't use 32 bits, you don't use 64 bits, you generally use 1024 bits, 4,048 bits.

但在当今的社会上，我们将讨论一点安全方面的知识,贯穿整个课程，密码学-,加密一些像信用卡信息,银行账号之类的东西--你不能用32位，你也不能用64位，你通常要使用1024位，4048位。

哈佛公开课 - 计算机科学课程节选