If represented graphically, the curve for all these changes looks rather like that well-known hockey stick: with little change over millennia and a dramatic upswing over the past decades.

如果用图表进行展示的话，这些变化呈现出来的曲线很像大家熟悉的曲棍球杆：以往数千年都没什么变化，而在过去的几十年内却突飞猛涨。

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While these arguments appear to make sense, looking at the data over the past several decades provides the opposite answer: more education would solve neither problem.

这些论断看上去好像挺有道理的，但看看这几十年的数据吧，答案正好相反：更多更好的教育什么问题也没解决。

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By following these rules, Gerry and I have saved thousands of dollars in car-related costs over the past two decades.

由于恪守这些法则，在过去二十年里，格里和我在汽车相关的成本上节省了数千美元。

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Has the shape of the British upper class as defined by hereditary title-holding changed over these past three decades?

ECONOMIST: M��lords, ladies and gentlemen

Harvard has seen fit to accept a handful of these children over the past two decades.

ECONOMIST: Alternative education (1)

Over the past few decades, these costs have risen at a consistent 2.5 percentage points above the growth rate of the economy.

ECONOMIST: American health care