关于Oracle的一个问题

Question

我新来公司，公司给你我一段这个代码让我输入到pl/sql中，是什么意思，谁能给我讲一下？

D_CENTSTDB =

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = 133.160.39.16)(PORT = 1521))

    )

    (CONNECT_DATA =

      (SERVICE_NAME = centstdb)

    )

  )

D_CRMTSTDB =

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = 133.160.39.16)(PORT = 1521))

    )

    (CONNECT_DATA =

      (SERVICE_NAME = crmtstdb)

    )

  )