Foreign scholars believe that parole fluency of nonparent language can be improved and attained by learning phrases and idioms, and by practicing repetition.

Foreign scholars believe that the main factors that influence the parole fluency of second language include lacking automaticly drawn second language information and failing to pick up quickly its instances, which deserves our high attention.

The teaching methods of lexical phrases is to be explained from different perspectives, such as input and output strategies, the role of memory, psychological process, language fluency and accuracy, pedagogical implication, in order to help overcome the weaknesses of communicating approach and improve learning efficiency further.

Both "meaning" and "language at that time" are not self-clear concept.