扩散

• Laser light does not spread out even at great distances .
  激光即使经过很远的距离也不会扩散。
• This regime is termed mass transport or diffusion limited .
  这种方式被称作质量输送或扩散控制。
• Man spread from africa to nearly all parts of the globe .
  人类几乎从非洲扩散到地球上的一切地区。
• Diffusion treatment, relies upon an immersion or spray treatment .
  扩散处理法依靠常压浸注或喷雾处理。
• Could we slide out and manage to prevent the spread of it ?
  我们是否能够退出来，并且设法防止它扩散呢？
• A viral infection may be localized disseminated or inapparent .
  病毒感染可以是局限的扩散性的或不显性的。
• Most spread will be within the field, perhaps into adjacent field .
  大都只在田内扩散，或许也扩散到邻田。
• The individual particles are spread over an increasingly wide interval .
  各个粒子扩散到一个越来越宽的范围。
• All these axes may be located with a transit in the exit cone .
  所有这些轴都可用放在扩散段内的经伟仪来定位。