The dialogue unity plays an important cohesive role between turns in translation and should be treated as the unit of translation.

A few of classes often occupy large proportion of vocabulary in speech recognition for many information query dialog system,which can be used to improve traditional search algorithm based on single lexicon tree.

This article is discussing about the subject quality of the network dialog, and draw to a result which isbased on three parts (the characteristics of network entironment, subjective dialog, main problems coming fromnetwork dialouge):networ dialouge develops greately the subjective spirits and gives birth to some negative sides.