克雷西和斯维德贝格使用超速离心法分析了用乙醇水溶液萃取的麦醇溶蛋白级分。
Krejci and Svedberg used ultracentrifugation to analyze the gliadin fraction extracted with aqueous ethanol.
柚皮提取物不同洗脱级分具有不同的抗氧化活性。
Different elution fractions from pummelo peel extract exhibit different antioxidative activity.
四年级学生中有三分之一在美国地图上找不到自己所在的州。
One in three fourth-graders couldn't find their state on a map of the U.S.
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