The economic value of water and water pricing水的经济价值和水的定价 Environmental and health aspects环境和健康方面 Water users’ organizations,stakeholders and participation水的用户组织，保证金和参与者 ..
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From two aspects of external environmental factor and individual factor, the causes influencing undergraduates' mental health are analyzed.
本文从外界环境因素和个体因素两方面分析了影响大学生心理健康的成因。
Lead: Chemistry, analytical aspects, environmental impact and health effects.
领导：化学，分析方面，环境及健康影响。
Some requirements related to environmental aspects could also be occupational health and safety requirements. 4.3.
与环境因素相关的要求也可能是职业健康与安全的要求。
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