常见例句用作名詞 (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.對鳥類學家來說，這和北美候鴿或卡羅來納長尾小鸚鵡大批大批地死亡同樣悲慘。 返回 passenger pigeon