研究人员曾对35名学生进行调查，让他们写下各自的农产品日摄取量，然后用分光光度计测量了他们的肤色。
Researchers had 35 students fill out questionnaires about much produce they ate daily, and a spectrophotometer measured their skin color.
研究人员曾对35名学生进行调查，让他们写下各自的农产品日摄取量，然后用分光光度计测量了他们的肤色。
Researchers had 35 students fill out questionnaires about much produce they ate daily, and a spectrophotometer measured their skin color.
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