Human error may have been a contributing factor.
人为的失误可能是一个起作用的因素。
A rapidly ageing population in many countries is also a contributing factor.
许多国家人口迅速老龄化也是一个促进因素。
Stress, both human and mechanical, may also be a contributing factor.
来自人的和机械方面的压力可能也是一个因素。
Stress is a contributing factor in many illnesses.
压力是许多疾病致病因素。
Stress is a contributing factor in many illnesses.
压力是许多疾病致病因素。
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