如图1所示，人类语音在说话时将生成独特的平均特征频率。
As you can see in Figure 1, the human voice produces a distinct average of characteristic frequencies when speaking.
人类气管经过进化改造，使得人在说话时，会促使气管和食管同时往喉咙处延伸。
Modifications of the trachea to allow speech pushed the trachea and esophagus further down the throat to make way.
人类气管经过进化改造，使得人在说话时，会促使气管和食管同时往喉咙处延伸。
Modifications of the trachea to allow speech pushed the trachea and esophagus further down the throat to make way.
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