病例对照研究
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cases control study 病例对照研究
control study of cases 病例对照研究
cases-control study
cases-control研究
以上为机器翻译结果，长、整句建议使用 人工翻译 。
That represents about 23% of the 9.6 million cases of food-borne illness each year, a study released Tuesday by the Centers for Disease Control and Prevention shows.
WSJ: Vegetables Are the Main Cause of Food-Borne Illness, CDC Study Finds
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