Occupational injuries were caused by environmental risk factors such as equipment defects, management and organization of the production and human factors.
工伤事故由多种因素造成，包括人为因素、机器设备缺陷、环境因素、生产组织与管理等方面。
Forest fires have caused huge losses to human life and property, so forest fire prediction and risk assessment becomes very urgent and necessary.
森林火灾给人类生命和财产造成了巨大的损失，因此对森林火灾的预测和风险评价显得十分迫切和重要。
The risk caused by microbiological hazards in food is very concerned to human health.
食品中来自微生物性危害的危险性密切关系到人类的健康。
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