关键期假说原来隶属于生物学,后来被引用到了语言学领域。但是,许多人赞同,许多人否定,不过肯定的声音似乎超过了否定的声音。但是两者都缺少研究对象,没有强有力的佐证;儿童在学习外语方面相对于成人来说有相对优势,但是到底几岁开始学习外语一直是一个悬而未决的问题。 The key period hypothesis originally belonged to biology and was later cited in the field of linguistics. However, many people agree that many people reject it, but affirmative voices seem to outweigh the negative voices. However, both of them lack the research object and there is no strong evidence. Children have a relative advantage in learning foreign languages ​​relative to adults, but studying foreign languages ​​at the beginning of the years has always been an open question.