摘要：婴儿时期的我们，是如何一点一点学会说话的？语言能力是天生的，还是后天习得的？给孩子学外语，到底从几岁开始比较好？过早地接触外语，会不会和母语打架？Reference：Bialystok,E.,Craik,F.I.M.,&Luk,G.(2012).Bilingualism:consequencesformindandbrain.TrendsinCognitiveSciences,16(4),240-250.Boyd,D.,&Bee,H.(2015).LifespanDevelopment(7thEd).PearsonEducation.Flege,J.E.,Yeni-Komshian,G.H.,&Liu,S.(1999).AgeConstraintsonSecond-LanguageAcquisition.JournalofMemoryandLanguage,41(1),78-104.Hoff,E.,Core,C.,Place,S.,Rumiche,R.,Señor,M.,&Parra,M.(2011).Duallanguageexposureandearlybilingualdevelopment.Journalofchildlanguage,39(1),1–27.Mechelli,A.etal.(2004).Neurolinguistics:Structuralplasticityinthebilingualbrain.Nature.431.Thordardottir,E.,&Brandeker,M.(2013).Theeffectofbilingualexposureversuslanguageimpairmentonnonwordrepetitionandsentenceimitationscores.JournalofCommunicationDisorders,46(1),1-16.