白内障盲人社会负担率 bilateral cataract-blindness burden
马歇尔避免了二十世纪初抗议小说中典型的受压迫、与白人社会冲突的悲剧性女主人公。
Marshall avoided the oppressed and tragic heroine in conflict with White society that had been typical of the protest novels of the early twentieth century.
他不过是一个南方的贫穷的白人，他的社会地位也不过比那里的那些有色人种高些。
He's a poor white man in the South; his social status was just better than those colored people.
研究发现，白人孩子的社会阶级会更容易影响到他们在学校的表现，这种影响比少数族裔更严重。
A child's social class is more likely to determine how well they perform in school if they are white than if they come from an ethnic minority, researchers have discovered.
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