*Vertices 3
1 "癌症" 0.0 0.0 0.0 x_fact 12.738854 y_fact 44.585987
2 "中华肿瘤杂志" 0.0 0.0 0.0 x_fact 3.821656 y_fact 27.176221
3 "中国肺癌杂志" 0.0 0.0 0.0 x_fact 9.129512 y_fact 28.237792
*Matrix 
0.000000 0.442614 0.293909 
0.442614 0.000000 0.343288 
0.293909 0.343288 0.000000