But the constraints of their own conditions and social environment are the obstacles for its realization as they break down their dreams in the city.
但是自身条件的不足和社会环境的种种限制，就像一道道有形无形的门槛不断粉碎着他们的城市梦，阻碍了其自我价值的实现。
The cost of reproductive constraints in resources and environment changes mainly in a supply of public goods, such as social welfare provision.
其中生育成本在资源环境约束下的变化主要体现在公共品的供给、社会福利提供等。
The cost of reproductive constraints in resources and environment changes mainly in a supply of public goods, such as social welfare provision.
其中生育成本在资源环境约束下的变化主要体现在公共品的供给、社会福利提供等。
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