(IP 
  (NP-SBJ 
    (NN 生态学界))
                    
  (VP 
    (ADVP 
      (AD 只好))
                    
    (VP 
      (VP 
        (VV 费尽)
                    
        (NP-OBJ 
          (NN 唇舌)))
                    
      (PU ，)
                    
      (VP 
        (ADVP 
          (AD 重复))
                    
        (VP 
          (VV 解释)
                    
          (IP-Q-OBJ 
            (IP 
              (LCP-TMP 
                (QP 
                  (CD 上万)
                    
                  (CLP 
                    (M 年)))
                    
                (LC 来))
                    
              (PU ，)
                    
              (NP-TPC 
                (NN 桧木))
                    
              (IP 
                (IP 
                  (NP-SBJ 
                    (PN 自))
                    
                  (VP 
                    (VV 生)))
                    
                (IP 
                  (NP-SBJ 
                    (PN 自))
                    
                  (VP 
                    (VV 长)))))
                    
            (PU ，)
                    
            (IP-Q 
              (NP-SBJ 
                (-NONE- *pro*))
                    
              (VP 
                (ADVP 
                  (AD 又))
                    
                (ADVP-WH 
                  (AD 何))
                    
                (VP 
                  (VP 
                    (VV 需)
                    
                    (NP-OBJ 
                      (NN 人类)
                    
                      (NN 帮助)))
                    
                  (VP 
                    (ADVP 
                      (AD 才))
                    
                    (VP 
                      (VV 能)
                    
                      (VP 
                        (VV 长出)
                    
                        (NP-OBJ 
                          (NN 幼苗))))))))))))))
arg0: 
                    生态学界 
                
arg1: 
                    唇舌 
                
argm: 
                    只好