ionosphere [aɪˈɑ:nəsfɪr]

例句:

• The ionosphere is that region of space contatining electrically charged species.
  电离层是指含有带电物质的空间区域.
  
• Its upper limit is determined by the conditions in the ionosphere.
  其上限由电离层的状态而决定.
  
• Rockets and artificial satellites can go far above the ionosphere.
  火箭和人造卫星能够到达电离层以上极远的地方.
  
• Fluctuations in solar radiation cause the ionosphere to expand and contract.
  来自MSN
• But the cause of the changes in the ionosphere was not established.
  来自THETIMES
• Mantle is responsible for sustaining our air, water and our atmosphere and ionosphere.
  来自SA