這樣的玩具早就有了。太陽能和風能的核心問題是能量密度不夠，還需要取決於天氣，實際上隻能當玩具演示用。

來源: hkzs 於 2024-11-29 10:26:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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