绝种

• Many of the earth ' s plants and animals have already died out
  地球上的许多植物和动物都已经绝种了。
• Many birds and animal had become extinct
  许多鸟兽现已绝种。
• Many birds and animals have been extinct
  许多鸟兽现已绝种。
• Many birds and beasts had became extinct
  许多鸟兽现已绝种。
• You don ' t know how to bring back an animal now extinct
  你们不知道，该如何才能让绝种的动物复活吧？
• Became extinct in 1681
  渡渡鸟raphus cucullatus于1681年绝种
• Many birds and beasts have been extinct
  许多鸟兽现已绝种。
• This is the largest extinction known
  这是最大的绝种已知。
• Many animals and birds are now extinct
  许多鸟兽现已绝种。
• Many birds and animals are now extinct
  许多鸟兽现已绝种。