Missing SID_LIST_ value left of equation for SID description in LISTENER.ORA

# listener.ora Network Configuration File: /opt/11g/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = PLSExtProc)

(ORACLE_HOME = /opt/11g/oracle/product/11.2.0/dbhome_1)

(PROGRAM = extproc)

)

(SID_DESC=


(GLOBAL_DBNAME = orcl)


(ORACLE_HOME = /opt/11g/oracle/product/11.2.0/dbhome_1)


(SID_NAME = orcl)


)

)
LISTENER =
  (DESCRIPTION_LIST =
  (DESCRIPTION =
  (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
  (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.146.131)(PORT = 1521))
  )
  )

ADR_BASE_LISTENER = /opt/11g/oracle

顶 啊