For the sake of ecological benefit of forestry resources, the external economy of forestry production must be adjusted by adopting state-oriented contract or agent-oriented contract system.
必须对森林资源的生态效益实施国家定向合同购买或代理（社会）合同购买的办法来校正林业生产的外部性。
For the sake of ecological benefit of forestry resources, the external economy of forestry production must be adjusted by adopting state-oriented contract or agent-oriented contract system.
必须对森林资源的生态效益实施国家定向合同购买或代理（社会）合同购买的办法来校正林业生产的外部性。
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