通过拍卡或者将卡挥动一下，可以用无线的方式将（付款金额）数据从卡传输到店铺柜台的接受器上。

With a tap or a wave, the cards wirelessly beam data to a receiving device on the shopkeeper's counter.

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这种卡是根据无线频率感应原理工作的，付款时只要将卡靠近商家的支付终端便可以显示详细交易清单并完成支付。

The card works by a radio-frequency detection method that requires the card only to be placed close to the merchant's terminal for the details of the transaction to be transferred and logged.

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