"melancholia" in Chinese (Simplified)
忧郁症忧郁感
Definition
一种深刻、持久的悲伤或抑郁感，通常没有明显原因。也可以指一种强烈的情感状态或（历史上）一种精神疾病。
Usage Notes (Chinese (Simplified))
“忧郁症”属于正式和文学用语，日常对话很少用，多见于心理学、文学等领域。比“悲伤”、“忧郁”更深层、更持久，不用于普通的短暂情绪。
Examples
She felt a deep melancholia after the summer ended.
夏天结束后，她感到深深的**忧郁症**。
Artists often explore melancholia in their work.
艺术家经常在作品中表达**忧郁症**。
The poem was full of melancholia.
那首诗充满了**忧郁症**。
There's a certain melancholia in autumn that I can't shake off.
秋天总有一种难以摆脱的**忧郁症**。
His music is beautiful, but it carries a touch of melancholia.
他的音乐很美，但带有一丝**忧郁症**。
Sometimes, on quiet nights, melancholia creeps in without warning.
有时，在寂静的夜晚，**忧郁症**会悄然袭来。