研究还表明，中产阶级和蓝领阶级抚养孩子的方法不同。

Research also suggests that middle- and working-class parents approach child-rearing in different ways.

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在那个时代，中产阶级也有上部下部之分。此外，也可以分为白领阶级和蓝领阶级。

In that era you also had your upper-middle class and your lower-upper class and off on the side were the collar classes, white and blue.

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大卫生长在一个蓝领阶级家庭，有一个刚愎自用的酒鬼父亲，母亲，如他所形容的，“非常紧张、易怒且焦躁不安”。

David was raised in a blue-collar family, had a 25 bigoted, alcoholic father, and a mother he described as "very nervous, irritable, anxious."

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