气泡

• Bubble chambers are not selective because they cannot be triggered .
  气泡室由于不能触发而没有选择性。
• The bubble has burst .
  气泡破了。
• We view fresh gas entering the bed only in the form of gas bubbles .
  新鲜气体可视作仅以气泡形式进入床层。
• The number and size of these bubbles increase with rise in gas velocity .
  气泡数及其大小随气速的加大而增加。
• Particles near the center of a bubble are carried upward in the wake .
  靠近气泡中心的颗粒在尾涡中被向上带去。
• The solids dispersed in bubbles play a possibly significant role .
  分散于气泡中的固体颗粒可能起着一种显著作用。
• The rising bubbles will induce a distinct circulation of solid in the bed .
  上升气泡引起床层中一种明显的固体循环。
• Bubbles simply supply a short cut for the faster-moving percolating gas .
  气泡不过是对快速运动的渗透气体提供了一条捷径。
• Liquid drains from the upper surface of the bubble and it soon becomes unstable .
  液体从气泡表面排出，气泡很快变得不稳定。
• This failure is known as preferential wetting and is responsible for blistering .
  这种故障称为优先吸湿，是产生气泡的原因。