You see the African-American individuals have a somewhat lower risk, although not a lot, from the white people individuals in this study, but the Mexican-Americans have elevated risk compared to the other two races.

非裔美国人患病风险相对较低,尽管在这项研究中,他们与白人之间的差异并不显著,但与这两个种族相比,墨西哥裔美国人患病风险则比较高

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Yeah, you have to take 2 lower divisions

你必须选两个相对较低的分支学科，

关于政治学 - SpeakingMax英语口语达人