intensity             
noun uk/ɪnˈten.sə.ti/ us/ɪnˈten.sə.t̬i/
C2 [ U ]强烈;剧烈 
the quality of being felt strongly or having a very strong effect
  The explosion was of such intensity that it was heard five miles away. 爆炸的巨响5英里以外都能听见。 
  [ C or U ](光、声等的)强度 
the strength of something that can be measured such as light, sound, etc.
  measures of light intensity 光强度的测量 
  [ U ](感情或看法的)强烈;认真;全情投入 
the quality of being very serious and having strong emotions or opinions
  The intensity of their relationship was causing problems. 他们关系中所牵涉的感情强烈得引发了问题。 
 - More examples
 - She sang with febrile intensity.
 - Scientists use the instrument to measure the intensity of the light.
 - The firemen were forced to retreat by the intensity of the heat.
 - The intensity of the earthquake is measured on the Richter scale.
 - His sculptures are said to have a great emotional intensity.