They may use a credit card for convenience.

他们可以为了方便而使用信用卡。

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。

Let us change the tense for convenience.

为了方便起见，我们把时态改一下。

For convenience, I keep my mobile phone near my bed when I am sleeping.

方便起见，我睡觉时把手机放在床边。

While many like to join package tours for convenience, I prefer to travel on my own.

为了方便起见，许多人喜欢参加旅行团旅行，但我更喜欢独自旅行。