On the basis of the previous work, the authors make an estimation about power density within the beam covered area.

推导了无线电波传输路径上各点经纬度及高度坐标等参数，并在此基础上进行了波束覆盖区功率密度的估算。

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The calculation of the model reveals the distribution variation of flue gas concentration and heat flux density within the furnace.

模型计算揭示烟气温度和热流密度在炉膛内的分布变化。

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This type of mold is widely used because it is? Comparatively easy to construct and it controls thickness and density within close limit.

这种类型的模具得到了广泛应用，原因在于其容易铸造，而且厚度和强度的误差极小。

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Probability density of finding an electron within that molecule in some given volume.

在分子内某空间找到,一个电子的概率密度。

麻省理工公开课 - 化学原理课程节选

MalariaControl.net can handle a lot of different sorts of variable, from the changing density of parasites within a human host as an infection progresses to the sort of treatment available in different places around the continent.

ECONOMIST: Linking up computers to defeat malaria

The density of water molecules within the leaf is typically 60 times greater than the density of carbon dioxide in the air, and the diffusion rate of the water molecule is greater than that of the carbon-dioxide molecule.

WSJ: Harrison H. Schmitt and William Happer: In Defense of Carbon Dioxide

The firm says the low power-density of its lasers and a series of safeguards ensures that human exposure remains within regulatory limits.

ECONOMIST: Wireless charging