当x的值变化时，将所有的阴影面积相加，就会得到阴影部分的体积，再解释一遍。

And then, when I add all of these areas together, as the value of x changes, I will get the volume. OK, let me try to explain that again.

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对于聚光灯和点光灯，阴影分辨率决定了阴影贴图大小。此外，对于在屏幕上覆盖小面积的灯，使用较小的阴影贴图分辨率。

For Spot and Point lights, shadow resolution determines shadow map size. Additionally, for lights that cover small area on the screen, smaller shadow map resolutions are used.

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有重度弥漫性肺间质改变，肺浸润阴影大于全肺面积50%是引起SARS患者病死的重要危险因素。

The severe pulmonary interstitial changes, and the size of foci were over 50 % of the area of lungs were important risk factor of leading to death of SARS patients.

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