| 释义 |
mental retardationn.（名词）- Subnormal intellectual development or functioning that is the result of congenital causes, brain injury, or disease and is characterized by any of various deficiencies, ranging from impaired learning ability to social and vocational inadequacy. Also called mental deficiency 智力迟钝：低于正常水准的智力水平或能力，起因于各种先天性因素、脑损伤或疾病。特征为各种能力显出不足，从学习能力到社会、职业能力均不足 也作 mental deficiency
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