1. among the largest bony fish; pelagic fish having an oval compressed body with high dorsal and anal fins and caudal fin reduced to a rudder-like lobe; worldwide in warm waters. 
   大型的多骨鱼；远洋鱼，椭圆体形，背鳍和尾鳍高，尾鳍退化为似舵的突出物；遍布世界各地的温暖水域。

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• 1. 垂直安定面和方向舵面积
  fimbrial vein 边脉...fin and rudder area 垂直安定面和方向舵面积...fin area 垂直安定面面积; (火箭)尾翼面积
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