|   组分  |       特征值  |       贡献率  |       累计贡献率  |    
|   1  |       2.710  |       33.881  |       33.981  |    
|   2  |       1.837  |       22.958  |       56.839  |    
|   3  |       1.224  |       15.294  |       72.134  |    
|   4  |       0.955  |       11.931  |       84.065  |    
|   5  |       0.514  |       6.423  |       90.488  |    
|   6  |       0.490  |       6.120  |       96.608  |    
|   7  |       0.271  |       3.392  |       100.000  |