⒈表示"行为者","...人","...物","...机"(如:actor,generator)⒉表示"性质","状态"(如:error)o.r.缩写词abbr.⒈=owner'srisk货主负责⒉=oxidationreduction氧化还原O.R.缩写词abbr.⒈=operatingroom手术室Or.缩写词abbr.⒈=Oregon