印刷行业数量众多，分布广泛，其环境有害因素不容忽视。
The printing industry is numerous, distributed widely, and its harmful environmental factors can not be ignored.
目的：了解本区生产环境有害因素测定情况，为今后职业健康防护工作提供参考。
Objective:To understand the risk factors of production environment in this district, to provide the reference for the prevention of professional health in the future.
已假定的环境有害因素，如：父母亲吸烟、同胞数量和空气污染都应对该病的患病率增加负责。
It has been hypothesised that environmental risk factors, such as parental smoking, number of siblings, and air pollution, are responsible for this increase.
因此，事实真相是在同一住宅内长大的双胞胎经历相同的环境有害因素，而这本身不会促使他们对哮喘的易感性发生变化。
Thus, the fact that twins grow up in the same house and experience the same environmental risk factors, does not contribute by itself to the variance in susceptibility to asthma.
象这些结果所显示的一样，如果家庭环境有害因素的影响依赖于遗传型，那么遗传型-环境就能解释其对哮喘和相关病症巨大遗传可能性。
If the influence of the home environmental risk factors depends on genotype, as suggested by these results, genotype-environment explains the large heritability for asthma and related disorders.
结论木制家具制造加工业的职业病危害不容忽视，应合理改善作业环境，控制有害因素的浓度和强度。
The working environment should be improved and the concentration and density of the risk factors should be controlled in order to protect the workers' health.
对煤矿危险与有害因素进行了辨识，由事故致因理论出发找到构成煤矿安全系统的人、机、环境、管理四个要素。
Mine risk factors have been identified, and based on the theory of the accident causing to find the coal mine safety system consists of man, machine, environment, and management.
职业性有害因素，即在生产环境和劳动过程中存在和产生的可能危害职业人群健康和劳动能力的各种因素。
Occupational hazards arise from a variety of factors in production environment and process which maybe harm the health and working capacity of workers.
对生产环境中某些有害因素进行了测定。
Several harmful factors in working environment were analyzed.
因种植和生产过程、土壤、大气环境及自身代谢等因素影响，其不仅含有植物的主要功效成分，同时也有微量有害成分存在。
Because of the effect of soil pollution, atmospheric environment pollution and self-metabolism, some harmful contents were also bioaccumulation in biotic fat during plant materials' growth.
因种植和生产过程、土壤、大气环境及自身代谢等因素影响，其不仅含有植物的主要功效成分，同时也有微量有害成分存在。
Because of the effect of soil pollution, atmospheric environment pollution and self-metabolism, some harmful contents were also bioaccumulation in biotic fat during plant materials' growth.
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