2. We humans are pretty good at communicating with sounds other than words. But how much of this is hard-wired, and how much do we pick up from others?【翻译】相比起用文字，我们还是比较擅长用声音交流。但这些声音中有多少是我们天生懂得发出的，又有多少是我们后天学习而来的呢？
【解说】今天的句子选自文章《欢呼声是后天学来的(双语有声)》hard-wired (生理和心理特征)固有的，根深蒂固的pick up 捡起；获得；收拾
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