悲伤

sad; sorrowful; mournful; distressed; heartbroken; woeful; heavy-hearted; sadly; sorrow; grief; sadness; heartache; woe; lament; be sad; be sorrowful; be grief-stricken; feel sorrow; be in grief; be in sorrow

逆流

countercurrent; crosscurrent; reflux; flow back; go against the current; upstream