> I have changed with your advice,and have a test.but the image is black.Nothing
> in my scene.

It's always helpful to post the bit of code you changed, otherwise 
nobody has any idea why your image is black, it could many different 
reasons.

This works for me, I also added the rotate command as it seems your 
points are not aligned with the axes:

box
         {
          -1.55,1.55
         rotate y*-30
         translate <x1-center_x,y1-center_y,z1-center_z>
         pigment{color rgb 1}
          finish {
            ambient 0
            diffuse ref
          }

         }

May I ask where you got the "reflection" numbers from in your 
pov-ref.txt file? If I knew where those numbers came from it might help 
trying to figure out what you want to achieve.

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