A mild form of depression occurring at certain seasons of the year, especially one recurring in winter that is characterized by loss of energy and sexual drive, restlessness, and often a craving for carbohydrates.季节性压抑紊乱：在一年中特定季节发生的一种轻微的抑郁症，尤指在冬季复发的轻微抑郁，其特征是丧失能量和性冲动、焦躁不安并且渴求糖类或碳水化合物