介质

• Physically it is impossible to have complete thermal insulation between two media .
  从物理学上讲，两种介质之间不可能有完全的绝热。
• We first take up the subject of optic ray propagation through a variety of optical media .
  首先研究光束通过各种光学介质的传播问题。
• If a medium other than water is to be used, saturate it with oxygen in a similar manner .
  若使用的介质不是水也用类似方法以氧饱和之。
• Water, coal measures and salt have densities markedly different from other earth materials .
  水、煤和盐的密度与其它介质有很大的差别。
• The zone of aeration may be treated more efficiently as a single moisture continuum .
  包气带可以更有效地作为一个单一的水分连续介质来看待。
• The sand box model is a reduced scale representation of the natural porous medium domain .
  砂槽模型是将天然的多孔介质区域按比例缩小的模型。
• The light travels in a composite medium made up of the film, the substrate and the cladding .
  光在由薄膜，衬底和覆盖层组成的混合介质中传输。
• Grana stacks have the interesting property of unfolding in low ionic strength medium .
  在低离子强度介质中，基粒垛叠能打开这是一个有意思的性质。
• Initially, large deformations take place as a result of grain movements and readjustments .
  最初，由于颗粒的移动和调整而使多孔介质发生较大变形。