生活事件、抑郁感和消极应对方式是影响学生身心健康的主要因素。
The life events, depression and negative coping style were the main factors affecting the cadets.
结论汽车废气是使外勤警碳氧血红蛋白饱和度增高的主要因素，已对交通警察产生一定的健康影响。
Conclusion The automobile exhaust was a main factor resulting in higher levels of saturation of carboxyhemoglobin in exposure group and had a certain impact on traffic policemen's health.
森林病虫害是影响森林健康的主要因素之一。
Forest insect pest and disease is one of the main factors influencing forest health.
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