primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth
elongate European surface-dwelling predacious fishes with long toothed jaws; abundant in coastal waters
例句
用作名词(n.)
Unlike most of its close relatives, the alligator gar can breathe air and survive above water for up to two hours.跟它的大部分近亲不同，鳄雀鳝能呼吸空气，能在离开水的情况下存活长达两小时。
