delayed development of speech
非言语发音 (non-speech vocalizations) 言语发育迟缓 (delayed development of speech) 鹦鹉学舌:言语包括文学化地重复曾听到过的 (echolalia: speech consisting of literally ..
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短语
语言发育迟缓
Language development delays
;
delayed language development
;
language retardation