Baby-boomers may recall, perhaps wistfully, how the golden-arched sign outside every McDonald's restaurant would proclaim how many customers had been served by the chain. As they became adults, the number kept on climbing: 5bn in 1969; 30bn in 1979; 80bn in 1990.婴儿潮一代也许会怀念，每个麦当劳餐厅门外的金色拱形指示牌如何宣告着这家连锁店服务了多少顾客。随着他们长大成人，这个数字一直在持续攀升：1969年为50亿人次；1979年为300亿人次；1990年为800亿人次。 Jerry Seinfeld, a wry chronicler of the trivial, was moved to ask: "Why is McDonald's still counting?" Do we really need to know about every last burger? Just put up a sign that says,"We're doing very well." The counting stopped. The signs said simply: "Billions and b
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