Water shortage and deterioration of water environment become the constraint factors to the urbanization and social development.
水资源匮缺和水环境恶化已成为制约城市化进程和社会进步的因素。
The model was determined by the 5 factors of sport enjoyment, involvement alternatives, personal investment, social constraint, and involvement opportunities.
所建立的5因素结构模型认为，运动倾向性是由运动乐趣、参与选择、个人投入、社会约束及参与机会5个因素决定。
However, due to the constraint of factors like the culture, social class and capital, it is hard to be realized on themselves!
但由于受文化、社会层次和资本等因素制约，依靠自身，难于实现！
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