这个词是什么意思？
These are a group of conditions with onset in the developmental period. The disorders typically manifest early in development, often before the child enters grade school, and are characterized by developmental deficits that produce impairments of personal, social, academic, or occupational functioning. (From DSM-5).
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D065886 · MeSH 2026。
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