emission [ɪˈmɪʃən]

例句:

• Zero emission - there's not even a tailpipe.
  来自VOA
• the emission of carbon dioxide into the atmosphere
  向大气排放二氧化碳
  
• The emission of gases such as carbon dioxide should be stabilised at their present level.
  二氧化碳等气体的排放应该稳定在当前水平。
  
• States have the option of adopting the even tougher California emission standards.
  各州也可以任意选择,是否采用加利福尼亚州更严格的排污标准.
  
• Pollution of the atmosphere by the emission of smoke.
  来自N. G. Clark
• Offered working process occurs without noise and gas emission.
  来自SA