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social structure was in fact so fluid-though recent statistics suggest a narrowing of economic opportunity as the latter half of the century progressed-that to talk about social classes at all requires the use of loose econmic categories such as rich,poor,and middle class,or eighteeth-century designations like "the better sort" 麻烦具体讲解一下第二个破折号以后,从that to talk about一直到such as之前这部分的意思,完全不懂啊…谢谢
social structure was in fact so fluid-though recent statistics suggest a narrowing of economic opportunity as the latter half of the century progressed-that to talk about social classes at all requires the use of loose econmic categories such as rich,poor,and middle class,or eighteeth-century designations like "the better sort" 麻烦具体讲解一下第二个破折号以后,从that to talk about一直到such as之前这部分的意思,完全不懂啊…谢谢
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