求翻译：Business card exchanges are an important part of any international business meeting .variations include where to keep your cards ,which languages the card should be in,and what to do with the business card once you have received it.one rule to follow :always bring five times more cards than you think you will need .To explore the nuances of a business card exchange ,we will examine the exchange as carried out by an american in japan.是什么意思？

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