这可能有助于解释为什么美国毕业生的中等真实工资水平自2000年以来已经下降了6%，比一般工资水平下降的多。
This may help to explain why the real median wage of American graduates has fallen by 6% since 2000, a bigger decline than in average wages.
他们认为美国人，甚至是那些收入中等水平的人，都抛弃了一般的货物，追逐奢华的商品。
They argued that Americans, even those of modest means, were abandoning merely adequate products for luxurious ones.
哈利的功课在中等以下，吉姆的功课刚达一般水平。
Harry is below average in his lessons and Jim is about up to average.
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