The researchers studied the diets of thirty-one thousand children ages two to eighteen over a thirty-year period.
VOA: special.2010.03.17
Over that eighty-one year period you would have gotten a multiple of seventy-two.
经过81年时间,你翻了72倍
And what happened is, over a 30-year or so period, the industry really shifted to be one where industry standards started to come into play, the customers started to have a bigger role.
经过了30年左右,这个行业发生了变化,出现了产业标准,消费者的角色也越来越重要。
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