1.This form of PMS has its own psychiatric designation: premenstrual dysphoric disorder (PMDD).
这种类型的经前综合症拥有自己的精神病学名称：经前不悦症（PMDD）。
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.On sight of snakes they will immediately be frightened and dysphoric.
一看到蛇，它们马上就会惊恐万分，烦躁不安。