沉降

• The rate of sedimentation of a suspended viral particle depends on its size and density .
  悬浮病毒粒子的沉降率因其大小和密度而异。
• Subsidence may be the critical factor in managing a ground water reservoir .
  地面沉降在管理地表水库的工作中可以算是一个关键性因素。
• It is in the early stages following the explosion that protection from fallout is most important .
  在爆炸后的早期内，对沉降物的防御最为重要。
• The magnitude of the hazard from fallout will then be far less than if the explosion were a surface burst .
  这时沉降的危险性就比表面爆炸条件下小得多。
• The composition of the fallout can also be changed by "salting" the weapon to be detonated .
  如果在起爆武器中另“加了料”，那么沉降物的成分也就会有所改变。
• This brings up the important fact that fallout can occur even when the cloud cannot be seen .
  由此得到一个重要的结论：甚至在云已经看不见时，沉降仍然能够发生。
• The settling of dust on vegetation may also be harmful, both to the plant and to animals that eat the plant .
  沉降在蔬菜上的灰尘也可以伤害植物和吃这种植物的动物。
• Peripheral deposition is favored by deep inspiration, slow respiratory rate, breath-holding, and airways obstruction .
  深向慢慢呼吸、屏息和气道阻塞，有助于周边沉降。
• Fall velocities are usually measured by observing individual grains settling in a column of still fluid .
  沉速通常是由观测单个颗粒在圆柱筒内静止的液体中沉降来测定的。
• Aggregates of molecules do not grow into crystals of a size large enough to settle or be filtered out .
  分子聚集体并不生长成为晶体，其粒子大小不足以使其沉降或被过滤出。