orcas

例句:

• Gray whales also suffer major predation on juveniles from orcas.
  来自SA
• It's a great place to see humpback whales and orcas.
  来自THETIMES
• You shouldn't be afraid of orcas, they are harmless.
  你不用怕它们, 它们不是攻击性的.
  
• Orcas need to be used aggressively for this tactic to succeed.
  为了这种战术得成功,需要进攻性得使用奥卡.
  
• The orcas then daintily eat the motionless herring one at a time.
  虎鲸随后就优雅地把一动也不动的鲱鱼一只只吃掉.
  
• Calves and weakened adults are taken by pods of orcas.
  来自BBC