您需要定义继承行为以便可以覆盖它。

You define the inheritance behavior so you can override it.

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隐藏和重写都重新定义继承的元素，但这两种方法之间有很大差异。

Both shadowing and overriding redefine an inherited element, but there are significant differences between the two approaches.

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因此，我们可以在单元级别定义这些变量，这样，单元中的每个框都将继承这些定义(图31)。

Therefore, we can define those variables at the cell level, so that every box in the cell will inherit those definitions (Figure 31).

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