Despite some overall disadvantage in education and job structure, black urban families headed by a migrant of rural origin did not experience lower average income than other black urban families.
尽管在教育和工作结构上总体来说处于劣势，但拥有农村移民背景的黑人城镇家庭在平均收入方面并不比其他黑人城镇家庭要低。
Polyunsaturated fats, which are typically of vegetable origin, have the opposite effect; thus corn, safflower, soybean and sesame oils tend to lower the level of potentially dangerous LDL.
多元不饱和脂肪主要存在于未加工的蔬菜里，它有着与上相反的功效；像玉米、红花、黄豆和芝麻油都含有较低的LDL。
The intermediante level of education of rural-urban black migrants has seved to lower the average level of education in both the black population of origin and the area of destination.
乡-城黑人移民不高不低的教育水平导致来源地（农村）和目的地（城市）黑人的平均教育水平下降。
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