If you select only one object, you will get the same effect as with the 'Bounding Box Center' button.

如果你只选中了一个物体，那么你将得到跟第一个按钮同样的效果。

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First, the algorithm constitutes layered bounding box tree according to some rules, when making collision detection, the detection results of last time, will produce speedup effect.

该算法首先按照一定的规则建立起树形分层包围盒，在碰撞检测的时候，可利用上次的检测结果，起到了加速的作用。

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Activates an imaginary reflective bounding box ripples can reflect off. Reflection box is off by default. This effect can slow down the render speed.

创建一个可以让波反射回来的想像中的反射边框，默认情况下该值为关闭(此效果会减慢渲染速度)。

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