这个词是什么意思？
Conditions characterized by language abilities (comprehension and expression of speech and writing) that are below the expected level for a given age, generally in the absence of an intellectual impairment. These conditions may be associated with DEAFNESS; BRAIN DISEASES; MENTAL DISORDERS; or environmental factors.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D007805 · MeSH 2026。
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