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1·Molecular diffusion also occurs in liquids and solids.

分子扩散同样也会在液体和固体中发生。

2·Molecular diffusion occurs in a gas as a result of the random motion of the molecules.

气体中的分子扩散是由分子的不规则运动产生的。

3·If the gas mixture in the tube is stagnant, the transfer occurs by molecular diffusion.

如果管中的混合气体是不流动的，那么传递就通过分子扩散来进行。

4·This cause serious pollution problems because mass is transferred less rapidly by molecular diffusion than by eddy diffusion.

这些引起了严重的污染问题，因为通过分子扩散的传质比涡流扩散的要慢。

5·The results also demonstrate that the breakthrough curves have similar characters under the condition of higher scale of molecular diffusion.

模拟结果还表明在较高尺度分子扩散条件下，其穿透曲线具有相类似的特征。

6·Presently, passive HTO samplers are being widely used abroad. It samples HTO in air based on the principle of gas molecular diffusion and permeation.

目前被动式氚取样器在国外取得了广泛的应用，它是基于气体分子扩散或渗透原理采集空气中氚化水蒸汽（ HTO）样品的一种方法。

7·In certain locations where atmospheric turbulence is lacking, smoke originating at the surface of the earth is dissipated largely by molecular diffusion.

在某些气体湍流缓慢的区域中，地球表面产生的烟雾很大一部分是通过分子扩散而消散的。

8·The former one was caused by the molecular diffusion from bulk to interface and the latter one was caused by the relaxation of H2D molecules at interface.

液滴扩张和收缩时，H2D分子存在从体相到表面的扩散快过程和分子在表面上的弛豫慢过程两个弛豫过程。

9·On the basis of molecular diffusion Fick's law and principles of energy and mass conservation, a simplified model of frost growth on a surface is presented.

根据斐克分子扩散定理及能量、质量守恒原理，提出一种表面霜增长的简化模型。

10·This paper has main researches on the molecular diffusion in the process of CO2-oil displacing, carrying our deep experimental researches in PVT cell and porous medium.

本文主要研究注CO2驱油过程中的分子扩散问题，分别从PVT筒及多孔介质两方面进行深入的实验研究。