ejection [ɪˈdʒɛkʃən]

例句:

• Radioactivity is the ejection of particles or radiation from the nucleus.
  放射性是原子从核中射出粒子或辐射的现象.
  
• Most of the crater is formed by ejection.
  大多数的弹坑是由于把泥土抛出而形成的.
  
• A rocket is propelled by the ejection of a portion of its mass to the rear.
  火箭是靠向后喷射其部分质量而推进的.
  
• Juninho received a red-card ejection for the unsportsmanlike conduct.
  来自WSJ
• Friday's coronal mass ejection came two days after another powerful solar flare.
  来自MSN
• Another function of oxytocin...: the ejection of milk from the lactating mammillary gland.
  来自E. Gellhorn