One group of whales has, instead of teeth, long strips of bone, hanging from their upper jaw. This is the baleen whale, the largest animal in the world.

  • 有一类鲸鱼,用从上颚骨垂下来的长条状的骨头代替牙齿,它就是须鲸,是世界上最大的动物。

  • 互联网摘选 2025-02-21 14:39:49

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