鱼类的肌肉和陆地动物的肌肉有很大不同。

Fish muscle is very different than that in land animals.

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陆地动物被认为是从海洋动物进化而来的。

Land animals are thought to have developed from sea animals.

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由于冰太冷，大多数植物和陆地动物都不能在冰上生活。

But most plants and land animals cannot live on the ice. It is too cold.

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由于冰太冷，大多数植物和陆地动物都不能在冰上生活。

But most plants and land animals cannot live on the ice. It is too cold.

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