difference between center and margin的用法和样例：
- A broker charges his customer interest on the difference between cost and margin when he carries stock.
- What is the difference between this and that?
- Dynamic focusing technology considerably improves fringe resolution of the CRT and compensates the difference between the focusing at the center and around the edges of the screen.
- This antagonism between center and surround means that ganglion cells respond to contrast and in this way sharpen the brain's response to edges and borders.
- The relation between center and locality is sharing power and subordination relation between center and locality at a certain form of organization of state power.