Its history is very ancient, the earliest known future generations, the latter in order to avoid the taboo, replaced by swing.

它的历史很古老，最早叫千秋，后为了避忌讳，改为秋千。

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And the ingenious invention doesn't even need to be plugged in to charge or have its battery replaced because it runs on power generated by the swing of your foot as you walk.

这项独创性的发明甚至无需充电或更换电池，因为它仅靠你走路时双脚的摆动来发电。

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