When we were in junior high school, as if we were in the physics class, the physics teacher gave us a special explanation of the adapter , and clearly remember that our teacher brought us a adapter for us to really learn, to really know adapter , and to give us a detailed explanation of the original adapter . Reason, the use of methods, the role of all knowledge teachers about adapter is really not leaked to us, I was also very interested, after coming home and quickly find a use, it is very convenient to use, in our life is also widely used, believe in the existence of the existence of adapter . Our life will bring great convenience.