The intensity of a ray of monochromatic light decreases exponentially as the concentration of the absorbing medium increases . 一束单色光的强度随着吸收介质的浓度增加而呈指数下降。
We now turn our attention to a quite different kind of flow, the seepage flow of a fluid through a porous medium . 现在我们要把注意力转向完全不同的一类流动，即通过多孔介质的渗流。
Such amplitude variations would be predicted on the basis of principles governing seismic velocities in heterogeneous media . 按照在非均匀介质内确定地震速度的原理，应能预测这样的振幅变化。
The dispersion medium, water, has the ability to disintegrate the material sufficiently to carry it into colloidal suspension . 作为分散介质的水能够充分地将这些物质分散并使之成为胶态悬浮体。
is the plane-wave propagation factor in the uppermost medium and w is the propagation factor of the surface wave. 是最上部介质中的平面波传播常数，而w是表面波传因子。
When an inhomogeneous plane wave is introduced into a dense dielectric layer, it can bounce between the two boundaries . 把一非均匀平面波引进折射率较高的介质层时，它会在上下界面间来回地“弹”射。
The basic theory of the method--that of a rigid inclusion in an elastic medium--has been developed by several investigators . 这种方法的基本理论--弹性介质中的刚性包体理论是由若干研究工作者发展的。
Carbonium ions in solution derive much of their stability from solvation effects and are formed more easily in more polar media . 正碳离子在溶液中由溶剂效应获得更高的稳定性，而且在极性较高的介质中更容易形成。
What new information have we gleaned about the comparatively dense gas-dust complexes of the interstellar medium over the past dozen years ? 过去的十几年里，有关星际介质的较密气尘复合体我们探明了哪些新东西呢？
