The results were the same even after the researchers controlled for factors like age and racial differences.
研究者按照年龄和种族分类后仍然得到相同的结果。
The study is also one of just a few to include a high enough proportion of Black couples that researchers can assess racial differences in conflict strategies and their effects.
该研究也是为数不多的包括了足够多的黑人夫妇的研究，使得研究者们可以评估冲突策略的种族差异及其影响。
What the eye sees as racial differences - between Europeans and Africans, for example - are mainly a way to adapt to climate as humans move from one continent to another.
我们眼中看到的人种差异，例如欧洲人与非洲人的差异，主要是人类从一个大陆向另一个大陆迁移时为适应气候所产生的。
What attitudes toward American life and toward racial differences are assumed in the text?
在其内容中对美国生活和种族差异作了哪些假设？
What attitudes toward American life and toward racial differences are assumed in the text?
在其内容中对美国生活和种族差异作了哪些假设？
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