(1) First, the paper defines the theory of narrative voice and points out the diplex meaning of narrative voice in the text and context.

(2) But there are still much disadvantage in the process whether in the single or diplex sludge system, such as the low NO3- yield and carbon source utilization, NO3- provide and so on.

(3) The discourse theory of public administration sets up the third way of advancing the quality of public policy, which has diplex meanings.

(4) About multiplex channel, a large number of problems frequently happened in protection cooperating between channel and diplex equipment.

(5) This dissertation specializes in Jiujiang's economy from the angle of switchover of diplex roles. "