Wind power is an ancient source of energy to which we may return in the near future.中的return wind
问题描述：
Wind power is an ancient source of energy to which we may return in the near future.中的return wind
我想知道的是return wind power
答
句子的意思：
风力是一种历史悠久的能源,也许在不久的将来我们（人类）会再次依靠它.
return是指“回归到某种状态”,wind就是风的意思.