We have moved from valves to transistors to minute transistors on microchips, from ferrite core storage to magnetic media to CD-ROMs, from copper wire to optic fibre.

 
  • 我们从电子管依次转向了晶体管和微芯片上的微晶体管,从铁芯储存转向磁介质然后又是可更改指令存储器,从铜线转向光缆。
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