The pushpull method is the easier of the two methods to use, and it performs the same operation as SketchUp's pushpull tool.

pushpull方法是两个方法中较容易使用的一个，它执行与SketchUp的pushpull工具相同的操作。

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For example, the previous article formed a box by creating a square Face object and calling the pushpull method with an argument of -9.

例如，前一篇文章通过创建一个正方形Face对象，并使用参数- 9调用pushpull方法，形成了一个盒状立体图形。

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