不要那些小制作(夹子,羽毛球之类的)要有点科学原理的!跪求(不求捣乱者)
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![不要那些小制作(夹子,羽毛球之类的)要有点科学原理的!跪求(不求捣乱者)](/uploads/image/z/7875568-64-8.jpg?t=%E4%B8%8D%E8%A6%81%E9%82%A3%E4%BA%9B%E5%B0%8F%E5%88%B6%E4%BD%9C%EF%BC%88%E5%A4%B9%E5%AD%90%2C%E7%BE%BD%E6%AF%9B%E7%90%83%E4%B9%8B%E7%B1%BB%E7%9A%84%EF%BC%89%E8%A6%81%E6%9C%89%E7%82%B9%E7%A7%91%E5%AD%A6%E5%8E%9F%E7%90%86%E7%9A%84%21%E8%B7%AA%E6%B1%82%EF%BC%88%E4%B8%8D%E6%B1%82%E6%8D%A3%E4%B9%B1%E8%80%85%EF%BC%89)
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