我们创建的球体(缺省)是白色的，因光照呈现为红色。

The sphere we created is white (the default), it appears red because of the colored light.

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与box函数相似，您可以使用sphere在显示窗口中创建一个3d球体。

Like the box function, you can use sphere to create a 3-d sphere in the display window.

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然而米尔·诺尔构造了一个7维球体(实际上是28个维度)，这个球体非常扭曲，无需通过创建拐角和折叠来解析。

But Milnor constructed a seven-dimensional sphere (in fact, exactly 28 of them) that is too badly twisted to be unscrambled without creating corners and folds.

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