1. Depressive disorders are a heterogeneous group of conditions that share the common symptom of dysphoric mood. 抑郁性疾患包括一组具有心情忧郁这一共同症状的若干情况。
2. Premenstrual dysphoric disorder (PMDD) is the most severe form of PMS, with the prominence anger, irritability, and internal tension. 经前情绪障碍（PMDD）是PMS中最严重的形式，表现为愤怒、易激惹、精神紧张。
3. The hypothesis related to the purpose is that the dysphoric girls depressive mood is less severe when positive emotional support from each system is higher . 本研究采前瞻性实验设计，追踪有忧郁情绪的青少女一个半月，分两个时间点分别青少女以及各支持系统的资料。
