There is, in fact, no market mechanism to take account of the cost of polluting the air and water in Hengjiang.
其实，在横江，根本就没有市场机制来顾及当地的空气污染成本和水污染成本。
But those ways are not the effective policy choice, the system of water rights should be built and protect effectively the water source by market mechanism.
但这几种方法并不是最为有效的政策选择，应建立以水权为核心的水权制度，通过市场机制实现水资源的有效保护。
The mathematical models for centralized mechanism and market mechanism of water resources allocation are established respectively.
水资源的分配有两种主要分配机制：集中分配机制和市场分配机制。
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