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)    )  )