阅读资料：为什么猫会打呼噜？
No one knows for sure why a domestic cat purrs, but many people interpret the sound as one of contentment. Our understanding of why a domestic cat purrs is becoming more complete; most scientists agree that the larynx (voice box), laryngeal muscles, and a neural oscillator are involved. 没有人确切知道为何家猫会发出呼噜声，但很多人都把这种声音理解成是一种心满意足的表现。我们人类对于家猫为何发呼噜声的认识正日趋完善；大多数科学家都赞成该现象与喉、喉部肌肉和神经元振荡器有关。高考资源网版权所有 ©2005-2009
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