Generally the numerical stimulation on flow field and temperature field of shell distance is based on porous medium model.

以往对换热器壳程流场和温度场的数值模拟都是建立在多孔介质模型基础上进行的，存在许多问题。

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The level of noise we hear also depends on the Angle and distance of the shell from the ear.

我们听到声音的大小同时也取决于贝壳与耳朵的角度及距离。

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a perfectly spherical shell dr at some distance, thickness, d r, dr we talk about it as 4 pi r squared d r, so we just multiply that by the probability density.

在某个地方的完美球型壳层,厚度，我们把它叫做4πr平方，我们仅仅是把它,乘以概率密度。

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So, what we can do to actually get a probability instead of a probability density that we're talking about is to take the wave function squared, which we know is probability density, and multiply it by the volume of that very, very thin spherical shell that we're talking about at distance r.

我们能得到一个概率,而不是概率密度的方法,就是取波函数的平方，也就是概率密度，然后把它乘以一个在ｒ处的,非常非常小的,壳层体积。

麻省理工公开课 - 化学原理课程节选

a perfectly spherical shell dr at some distance, thickness, d r, dr we talk about it as 4 pi r squared d r, so we just multiply that by the probability density.

在某个地方的完美球型壳层,厚度，我们把它叫做4πr平方，我们仅仅是把它,乘以概率密度。

麻省理工公开课 - 化学原理课程节选

The colors provide a stark contrast to the dark burned-out shell of a house that sits in the distance -- and offer a painful reminder of the tragedy that befell the people who lived within.

CNN: Kentucky house fire kills 2 adults, 5 children

The camera is certainly a bit larger and heavier than it looks from a distance, but housed within the slightly oversized shell are some pretty good optics and some snappy performance.

ENGADGET: Panasonic Lumix DMC-GF1 hands-on, with 720p test footage!

He said Sapper Smith was 866ft (264m) from the shell's target when he was hit, but safety guidelines recommended a distance of 1, 640ft (500m) from smoke shells to allow for error.

BBC: Data error 'caused death of Kent Sapper Mark Smith'