He paid the whole bill with an American Express card.

他用美国运通卡支付了全款。

This is the American Express Card.

这是美国运通卡。

It's an American Express Card.

它是一张美国限时兑现卡。

By American Express Card.

用美国运通信用卡。

Can I pay with my American Express Card?

我可以用美国运通卡吗？