A rebound effect is at work: car dealers and Banks that stopped advertising in 2008 have decided they cannot stay out of the market for ever.
反弹效应在发挥作用：2008年停止投放广告的汽车商和银行已经决定不能总是在广告市场之外徘徊。
The effect of car care best practices, such as changing your oil or checking a tire's air pressure, is not implicit unless we have measurements to quantify what we gained or lost.
采取汽车保养最佳实践所产生的效应，例如更换机油或检查轮胎的气压，并不能用于准确地评价质量，除非我们确实找到了度量质量好坏的手段。
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