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鲸鱼经常浮出水面呼吸,却喜欢在海里睡觉,不怕被憋死吗?
为了理解鲸鱼为何能够在海洋中安然入睡,我们需要探讨其进化史。大约5000万年前,鲸鱼的祖先为了适应环境变化,迁移到了海洋中。这一过程导致鲸鱼的身体发生重要变革,但依然保留了部分陆生特性,如使用肺而非鳃呼吸。
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