Analysis of language comprehension and expression abilities in children with language barrier 
Ma Liang, Shan Yanchun, Liu Xiaomei, Fu Peng, Ran Ni, Yi Mingji
International Medicine and Health Guidance News . 2022, (14): 2028 -2032 .  DOI: 10.3760/cma.j.issn.1007-1245.2022.14.023

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