Therefore, the volume down to the topmost perforation must be accurately known (from the tally and surface volume of pipework).

因此，(根据管道系统的计数和表面积)准确了解下降到最顶层穿孔的体积。

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Based on the splatting algorithm, an accelerated algorithm is used to pick up the nearest surface volume and realize fast volume rendering.

在抛雪球法的基础上，采用提取最近表面体素的方法实现加速。

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So if we want to talk about the volume of that, we just talk about the surface area, which is 4 pi r squared, and we multiply that by the thickness d r.

如果我们要讨论它的体积，我们要用的是表面面积，也就是４πｒ的平方，乘以厚度ｄｒ

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But as an object gets smaller, the ratio between its surface area and its volume rises.

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