About this episode
今天的gift课程里老师带我们做了关于磁铁的实验。一个实验是设计一个利用磁力悬浮在空中的装置。我用两个磁铁环套在铅笔上，铅笔限制了磁铁环水平方向的运动，垂直方向上两个磁铁环相互排斥，其中一个就可以悬浮在空中了。还有一个是显示磁铁周围磁力分布情况的实验......
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