当学者们研究婚姻时，他们常常把研究重心放在白人身上，然而当研究到非裔美国人时，他们又常常只研究社会较底层的阶级。
When scholars study marriage, they usually focus on white people, yet when they focus on African Americans, they usually study the lower classes.
如今，大多数人类学者研究现代社会，如美国与日本，探讨他们的文化如何变迁。
Most anthropologists today study modern societies, such as the USA and Japan, and how their cultures have changed.
综合国内及美国本土学者的研究成果，我们大致可以将美国的种族问题研究划分为历史研究和社会学研究两大类。
Up till now, most of the research and studies on American racial problem can be divided into two categories: historical and sociological.
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