Hints： inherited 因音频缺失，所以给出最后一个词是 incredible...

And our ear bones are not the only things to have been transformed in this way. Such apparent miracles are in fact all around us. The rest of our ears that allow us to balance and walk upright as well as hear, our limbs and hands, our whole body has been shaped by the process of evolution.
Everything about the human body has been inherited and adapted from something our ancestors had a long time ago. Even though they may have used it for something entirely different, we are recycled from the past.
Once we begin to understand the source from which our bodies are derived, the way we look at ourselves can never be quite the same again. So every part of the human body bears a shadow from our distant past. Evolution has adapted our bodies from those of our ancestors, all the way back since life was as simple as that in the steaming pools of three billion years ago. It is incredible...

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