签署支票，写信，购买住宅或完成一项商业上的交易，都得用笔签字。
We cannot sign a cheque or write a letter or buy a house or complete a business transaction without our pen.
在美国，几乎所有商业交易的详细过程都被写在收据上，然后由顾客签字，以避免沟通错误。
The details of almost all business transactions in America are written down on receipts, which are then signed by customers to avoid communication errors.
巴西人则可能更喜欢把重点放在最近的一宗商业交易上。
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