Major depressive disorder:
Major depressive disorder (MDD) (also known as clinical depression, major depression, unipolar depression, or unipolar disorder; or as recurrent depression in the case of repeated episodes) is a mental disorder characterized by a pervasive and persistent low mood that is accompanied by low self-esteem and by a loss of interest or pleasure in normally enjoyable activities.
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重性抑郁障碍:
重性憂鬱症，也被称为临床抑郁症、重性憂鬱障礙、单相抑郁，是一种精神疾病。
zh.wikipedia.org
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Major depressive disorder重性抑郁障碍