n.仲裁人; 公断人; 裁决人; 决定者; 权威人士

复数：arbiters

牛津词典

noun

仲裁人；公断人；裁决人；决定者；权威人士a person with the power or influence to make judgements and decide what will be done or accepted

The law is the final arbiter of what is considered obscene.何谓猥亵最终由法律裁决。

an arbiter of taste/style/fashion 鉴赏 / 款式 / 时装权威

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arbiter