( 
  (IP 
    (NP-SBJ 
      (CP 
        (WHNP-1 
          (-NONE- *OP*))
                    
        (CP 
          (IP 
            (NP-SBJ 
              (NN 进口)
                    
              (NN 产品))
                    
            (VP 
              (VV 占)
                    
              (NP-OBJ 
                (NP 
                  (NP-PN 
                    (NR 中国))
                    
                  (PP 
                    (P 自)
                    
                    (NP-PN 
                      (NR 日本)))
                    
                  (NP 
                    (NN 进口)))
                    
                (NP 
                  (NN 总额)))
                    
              (NP-EXT 
                (-NONE- *T*-1))))
                    
          (DEC 的)))
                    
      (NP 
        (NN 比重)))
                    
    (VP 
      (ADVP 
        (AD 则))
                    
      (ADVP 
        (AD 不规则))
                    
      (VP 
        (VV 波动)))))
arg0:  *OP* 进口 产品 占 中国 自 日本 进口 总额 (*T*-1)->(比重) 的 比重 
argM:  则 
argM:  不规则