我正在阅读有关遮挡剔除here的内容，并且在“遮挡物与遮挡物”部分中写道：
The problem with the basic approach is that bounding boxes cannot write to the depth buffer, because there are some really weird cases when one bounding box completely occludes another bounding box, but the object inside the occluder's bounding box doesn't in fact occlude the object inside the occludee's bounding box, as shown in Figure 29-1.
有人可以解释一下，对于在深度缓冲区中编写ABB可能有用吗？