These ethnic- and class-based traditions themselves challenged the legitimacy of patriarchal marriage.
这些基于种族和阶级的传统本身就挑战了父权婚姻的合法性。
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There's moderate demand for ads based on ethnic information, but the companies acknowledge that determining ethnicity is more challenging than figuring out gender and age range.
Pakistan is an artificial puzzle piece that, unlike India, has no logical frontiers, so different, territorially basedethnic groups exist uneasily together.