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0第3期，以2025年起始年龄与暴露时长研究为核心，拆解双语启蒙常见误区，给出按年龄的实操建议。
参考资料：
1、John Benjamins: Age of onset does not matter for bilingual children's understanding of late-acquired phenomena (2025)
2、Cambridge Core: Effects of bilingualism on foreign language learning during kindergarten years (2025)
3、Cambridge Core: Cross-linguistic transfer in bilingual children's phonological and morphological awareness — longitudinal perspective (2024)
4、MDPI Languages: Language Proficiency Across Tasks in Sequential Bilingual and Monolingual Children (2025)
