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来源:雅诚德英语网
The study was based on birth certificate information for all deliveries in the US either side of each holiday across 11 years - in total more than 1.8 million births.
该研究是基于美国11年间每个节日所有小孩出生的出生证明信息而得出的结果——总计出生小孩超过180万个。