electrification       
noun [ U ] uk/iˌlek.trɪ.fɪˈkeɪ.ʃən/ us/iˌlek.trə.fəˈkeɪ.ʃən/
 电气化
the process of making a machine or system operate using electricity when it did not before
  the electrification of the railways 铁路的电气化 
 electrification technology 电气化技术