心智缺陷 meaning in English

mental defect
mental deficiency

She is a mental defective
她是个心智缺陷者。
An act committed by a person who was suffering mental disorder or intellectual defects at the time of commission of the act , making him incapable of discerning that the act was unlawful or behaving according to his perception , is not punishable
行为时因精神障碍或其他心智缺陷，致不能辨识其行为违法或欠缺依其辨识而行为之能力者，不予处罚。