This article employs the method of element changing in definite integral to spread the dimension formula of plane figures.
介绍了同一平面图形按不同方式运动截取一部分形成的立方体的图形及计算方法。
This article employs the method of element changing in definite integral to spread the dimension formula of plane figures.
介绍了同一平面图形按不同方式运动截取一部分形成的立方体的图形及计算方法。
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