*Vertices 3
1 "中华核医学杂志" 0.0 0.0 0.0 x_fact 3.773585 y_fact 45.754717
2 "核技术" 0.0 0.0 0.0 x_fact 10.849057 y_fact 38.679245
3 "同位素" 0.0 0.0 0.0 x_fact 10.377358 y_fact 15.566038
*Matrix 
0.000000 0.292750 0.576368 
0.292750 0.000000 0.806444 
0.576368 0.806444 0.000000