But several demographic studies have shown that even women just considered "overweight," with a body mass index of 25-30, may also be at increased risk of contraceptive failure.
然而一些人口研究的结果显示，那些身体质量指数超过25，不到30的女性也存在不断增加的避孕风险。
Not everyone with high CO2 levels had a near-death experience, and previous studies have found that demographic and psychological factors are also involved.
不是所有血液中二氧化碳浓度高的人都会有这种经历，先前的研究发现人口学和心理学上的因素也起到了影响。
Many studies abroad proved difficult as the demographic characteristics of the green consumer market segmentation variables.
国外许多研究证明人口统计特征难以作为绿色消费者的市场细分变量。
The research tests the students'subjective well-being of college students by the Index of Well-being, mainly studies the effects of demographic factors on college students'subjective well-being.
然后采用幸福感指数量表对大学生主观幸福感进行问卷调查，探讨不同性别、年级、专业、生源地及父母受教育程度等人口统计学因素对大学生主观幸福感的影响。
The research tests the students'subjective well-being of college students by the Index of Well-being, mainly studies the effects of demographic factors on college students'subjective well-being.
然后采用幸福感指数量表对大学生主观幸福感进行问卷调查，探讨不同性别、年级、专业、生源地及父母受教育程度等人口统计学因素对大学生主观幸福感的影响。
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