objector

名词 objector:

1. a person who dissents from some established policy
   同义词：dissenter, dissident, protester, contestant

1. Allen is the chief objector to the proposed by-pass, but he has a vested interest because it would take most of the trade from his garage.
   阿伦是对所提议的旁路计划的主要反对者，他是既得利益者，因为那会把他汽车修理厂的大部分生意夺走。