这些结果来源于一项为期两年的研究。该研究对英国人口进行横断面分析，旨在调查年龄增长对心血管系统产生的影响。
The results are based on the findings of a two-year study of a cross-section of the British population, which examined the effects of ageing on the cardiovascular system.
这些结果来源于一项为期两年的研究。该研究对英国人口进行横断面分析，旨在调查年龄增长对心血管系统产生的影响。
The results are based on the findings of a two-year study of a cross-section of the British population which examined the effects of ageing on the cardiovascular system.
我们在巴西圣保罗恩布进行了横断面研究，即家庭滥用体罚多国调查的巴西调查部分。
We conducted a cross-sectional study in Embu, São Paulo, Brazil, as the Brazilian component of a multicountry survey on abuse in the family environment.
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