In the field of second language phonetic learning,the interlanguage hypothesis is supported by the studies under the guidance of generative phonology.However,in recent 20 years,more and more studies on phonetic acquisition,especially segmental acquisition,have witnessed the return of the theory and method to contrastive analysis hypothesis.Some phonetic learning patterns based on perception come out in succession,and the explanations of the mother tongue transfer of the learner’pronunciation go back from the phonological level to audio-visual ...