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1. Oxford American Dictionary

   ground rule

   • IPA[ˈɡround ˌro͞ol]

   美式

   • n.
     a basic principle；a rule pertaining to the limits of play on a particular field.

   • noun: ground rule, plural noun: ground rules

2. • 釋義

   n.

   名詞

   • 1. a basic principle some ground rules for assessing new machines
   • ▪ a rule pertaining to the limits of play on a particular field.