| 1. | The lower boundary of the region above which molecular diffusion dominates is 120 km altitude and is known as the turbopause .
分子扩散占主导地位的区域下界约在120公里处称为湍流层顶。 |
| 2. | The spontaneous intermingling of the particles of two or more substances as a result of random thermal motion
分子扩散运动两种或更多种物质的分子由于随机的热运动自发混合在一起 |
| 3. | Molecular diffusion induced by temperature is thermal diffusion , and that from an external field is forced diffusion
由温度引起的分子扩散称为热扩散，由外场力引起的扩散称为强制扩散。 |
| 4. | Molecular diffusion is the predominant mechanism controlling volatile organic compounds transport within the composite liner
有机挥发性化合物在复合衬里中迁移时，其主要的机理是分子扩散作用。 |
| 5. | Combing the experimental results , the quantitative research was done for the non - fick effects during fast transient molecular diffusion
结合实验结果，对快速瞬态分子扩散过程中表现出来的非fiek效应问题作了定量的理论研究。 |
| 6. | The study indicates that , the slippage effect is a combined result of gas molecule slip on capillary wall and gas molecular diffusion inside capillary tube , and also a result of combination of concentration and pressure fields
研究认为，气体滑脱效应是毛细管壁处气体分子滑流和毛细管内部气体分子扩散的综合效应，是浓度场和压力场作用叠加的结果。 |
| 7. | Take the liquid - liquid transient mass diffusion for granted , experiments on fast transient mass diffusion between a nacl solution and pure water was conducted . with the experimental results , the physical mechanism of fast transient mass diffusion was revealed
以液体与液体间的快速瞬态扩散传质问题为例，对nacl溶液和纯水快速接触的瞬态扩散传质问题进行了实验研究，根据实验结果，揭示了快速瞬态分子扩散过程中质量传递物理机制。 |
| 8. | Since the novel m41s mesoporous materials ( particularly mcm - 41 ) was firstly reported by mobil ' s researchers , much attention has been paid to this kind of materials . they have not only larger surface area , uniform pore structure and huge pore volume , which can reduce bottleneck phenomenon in molecular diffusion , but also higher mechanically and chemically stability as new inorganic materials . these materials have been widely used as catalysts , sorbents and separation materials as they were synthesized firstly
介孔材料作为一种新型功能材料，由于其具有较大的比表面积、长程有序的孔道结构、较大的孔容、良好的扩散性能和能够减小分子扩散中的瓶颈效应等特点，以及作为无机材料所具有的机械和热稳定性，所以自1992年mobil公司开发研制了以mcm - 41为代表的m41s系列介孔材料以来，被广泛应用于催化、吸附和分离等领域。 |
| 9. | Constructing quantitative model with ordinary differential equations for the cell - cycle control system , it is appropriate to use ordinary differential equations ( odes ) , because molecular diffusion , transcription , translation and membrane transport seem to be fast ( a matter of seconds ) compared with the duration of the cell cycle ( hours ) . spatial localization of reactions can be handled by compart - mental modelling , in the spirit of pharmacokinetics
对于这样的细胞周期控制系统，应用常微分方程是适合的，因为比起细胞周期的时间（以小时计）来，分子扩散，转录，翻译和膜运输是很快的（以秒计应用药物动力学的区域化模型的方法，可以处理反应的空间分布。 |
| 10. | Three kinds of inflows with different combination of temperature and salinity are studied . results show that difference of diffusion between temperature and salinity have little effect on mean flow fields . but significant effects will arise when components are distinct in contribution to water density
成果分析指出了温盐共同作用引起的高雷诺数紊动浮力流动受温度和盐度的分子扩散速率差异的影响很小：但是因各组分对环境水体密度影响差异会造成不同的浮力流动特征。 |
