我们每天用电脑，当我们去便当店，刷卡消费时，很多电脑就配合起来以完成我们的买卖。
We use computers every day sometimes even not knowing it. When we go to a store and use our credit CARDS many computers process our information and perform transactions.
我们每天用电脑，当我们去便当店，刷卡消费时，很多电脑就配合起来以完成我们的买卖。
We use computers every day sometimes even not knowing it. When we go to a store and use our credit CARDS many computers process our information and perform transactions.
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