依据语言习得理论分析成人第二语言语音习得的调查结果得知:四个母语为普通话的成年女性,在接受了20个小时的美式英语语音的教学指导后,所有参与者单词发音跟以美式英语为母语的人一样准确。虽然我们经常听到这样的论断:成年人学习第二语言的发音想要达到母语水平是不可能的,而调查结果表明:之所以没达到这样的水平,是由于在教学中没接受适当而必要的指导所造成的。因此,只要我们教授给学生必备的语音知识,并加以引导,成年人完全可以在20小时内完全掌握美式英语发音,并说得像美国人一样地道。 According to the results of the survey on L2 acquisition of adult learners based on the theory of language acquisition, it is found that four adult female speakers of Mandarin Chinese, after receiving 20 hours of instruction in American English phonetics, Native American speakers are as accurate as their native speakers. Although we often hear the assertion that it is impossible for adults to learn the pronunciation of a second language if they want to achieve their native language level, the survey results show that the reason why such a level has not been reached is that they did not receive proper and necessary teaching Caused by the guidance. Therefore, as long as we teach our students the necessary phonetic knowledge and guide them, adults can perfectly master the pronunciation of American English within 20 hours and speak as authentic as the Americans.