前言:影响二语习得的因素很多,单从习得者自身角度考量,就包括了习得者的年龄、性别、语言学习能力、学习动机和学习态度等。一般人们认为年龄是最为关键的因素。人们普遍认为孩童在二语习得方面比成年人更有天赋,原因是孩童的可塑性更强。一些知名的语言学家也猜想是否存在某个关键期,在这个关键期里,人们二语习得速度越快,效果也越好。其中影响最大的当属Lenneberg于1967年从医学临床经验,以神经生理学的观点系统地解释语言学习关键 Preface: There are many factors that affect second language acquisition. From the point of view of the learner alone, the acquisition includes the age, gender, language learning ability, motivation and attitude of the learner. People generally think that age is the most crucial factor. It is generally accepted that children are more gifted than adults in second language acquisition because of their greater plasticity. Some well-known linguists also guess whether there is a critical period in which people acquire second language faster and have better results. One of the most influential, Lenneberg, from the medical clinical experience in 1967, systematically interprets the key of language learning from the neurophysiological point of view