They may use a credit card for convenience.

他们可以为了方便而使用信用卡。

《柯林斯英汉双解大词典》

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

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。

《柯林斯英汉双解大词典》

Asked if she would use a credit card if one were given to her, Ms. Zhang looked confounded.

当问到如果给她一张信用卡的话，她是否会使用。

youdao

Millions of Americans now use a debit card or credit card, instead of paper money or checks, to make most of their purchases.

VOA: special.2009.05.21

With a credit card, you are borrowing money every time you use it.

VOA: special.2009.05.21

Either way, you can now use a credit card to eat at the Golden Arches.

NPR: Rabid Reader: 'Fat Land' and U.S. Supersizing

So banks want you to use a credit card when you make your purchases.

FORBES: Will Debit Fees Push Consumers Back To Credit Cards?

"Some people have never thought about whether it costs someone else" to use a credit card, she says.

WSJ: Small Businesses Confront 'Swipe Fee' Conundrum