ora 文件新增连接后 --》无法解析指定的连接标识符

一个空格引发的血案：  dmauser_dma2017 前面 有个空格 就一直报
无法解析指定的连接标识符

dmauser_dma2017=
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.2.45.133)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER =  DEDICATED)
      (SERVICE_NAME = yc)
    )
  )