在解释了我们背包里每件物品的功用后，我们得以继续前行。

After explaining the purpose of every item in our packs, we were finally allowed to walk on.

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第三种假设却认为，音乐并非功用性，邓巴教授对此也作出解释。

The third hypothesis, though, is that music is not functional, and also that Dr Dunbar has got things backwards.

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王学兵说：“我有时在车舱里给他解释装置的功用，在他三岁的时候，他求我让他试一试开挖土机。

Xuebing said: 'I sometimes explained to him the functions of the gears within the compartment, and when he was three he asked me to have a try.

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