At least one previous study, published in 2009, has claimed a relation between unusually hot years and the risk of civil strife.
至少有一项早期研究(发表于2009年)认为反常高温年份与内战冲突风险之间具有相关性。
Several studies have found that exercise diminishes the effect of the risk gene but this is the first study where the effect of the gene has been studied in relation to food habits.
报告中说明好几项研究发现,运动消弱了肥胖基因的作用,而且这是第一次在基因的影响和饮食习惯之间做相关研究。
The head's distance from the screen and position in relation to it are also important risk factors.
头部和屏幕之间的距离以及两者之间的方位关系同样是重要的风险因素。
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