同根派生 英汉例句用作名词 (n.)It was extinction by dilution, and to the ornithologists it was just as tragic as the more dramatic demise of the passenger pigeon or the Carolina parakeet.对鸟类学家来说，这和北美候鸽或卡罗来纳长尾小鹦鹉大批大批地死亡同样悲惨。