介质

• Sound travels through the medium of air .
  声音通过空气介质传播。
• The surface material consists of drift .
  表层介质是冰碛组成的。
• The randomness is attributed to the porous medium .
  随机性起因于多孔介质。
• Perforated plates correspond to heterogeneous media .
  多孔板相当于均匀介质。
• In a uniform medium light travels in straight lines .
  在均匀介质中光沿直线传播。
• Water is the most harmful agent .
  水是一种最有害的介质。
• Such material can confine water in an artesian aquifer .
  这样的介质能把水控制在承压含水层中。
• Only dielectric stratified media will be treated in this section .
  这一节将只讨论介质分层媒质。
• The same sort of problem may exist with some neurotransmitters .
  对于某些神经介质也存在这种问题。
• Colloidal particles are bombarded by molecules of the dispersion medium .
  胶粒会受到分散介质分子的碰撞。