At prerequisite of rent capitalization and led by demand and scarcity, in this paper, we put forth an available land valuing model. A basic factor of the model is an index of product Value density.

本文以地租资本化为前提，以需求与稀缺性为导向，提出一简易、可行的地价评估模型，其基本要素是国民产值密度指标。

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A proton contains three charged quarks bound by the strong force and its radius is defined as the distance at which the charge density drops below a certain value.

一个质子由三个带电的夸克通过强相互作用力结合而形成，它的半径是由电荷密度降到某一确定值的距离来确定的。

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The value of the critical density is very small: it corresponds to roughly 6 hydrogen atoms per cubic meter, an astonishingly good vacuum by terrestrial standards!

临界密度的值非常小：它相当于每立方米约6个氢原子，从地球上的标准来看这简直是真空！

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And one common way to think about it, is to think about the value of r, or the radius, below which 90% of that electron density is going to be contained.

而通常的想法，是想象，r，的值，也就是半径的值，即有百分之九十的电子密度,都落在这个范围之内。

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The lost amenities and added population density, they said, would cut their property value by a third, and they were not going to take it lying down.

ECONOMIST: The well-off stand up for their rights