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1. Oxford American Dictionary

   public policy

   • n.
     the principles, often unwritten, on which social laws are based.；the principle that injury to the public good is a basis for denying the legality of a contract or other transaction.

   • noun: public policy

2. • 更多解釋

   public policy

   • n.
     the principles, often unwritten, on which social laws are based.

   Oxford Dictionary