fins

例句:

• This cylinder has an open-ended steel barrel with integral fins.
  来自R. T. Glazebrook
• Fins are a feature specific to fish.
  鱼鳍是鱼类特有的特征.
  
• He could see their wide, flattened, shovel - pointed heads now and their white tipped wide pectoral fins.
  他这时看得见它们那又宽又扁的铲子形的头,和尖端呈白色的宽阔的胸鳍.
  
• They were flapping their bat - like fins before dropping back into the water with a terrific splash.
  它们拍打着蝙蝠般的鳍,然后随着令人恐惧的溅水声掉进了水中.
  
• One of our co-authors saw them actually flapping their fins.
  来自SA
• But shark fishing and the import of fins are allowed.
  来自VOA