沉悶 和 煩悶 和 憂悶 的差別在哪裡？如果不好說明，請提供一些例句。
沈悶and煩悶are synonyms. They are almost the same. 煩悶just feels a bit annoyed. And 憂悶is seldom used. It is not necessary to learn how to use it. You will know it when you see it.
e.g.
1. 當我心情沈悶（煩悶）時，我會找事情做來轉移注意力。
2. 找不到女朋友讓他很沈悶（煩悶）。,沈悶and煩悶are synonyms. They are almost the same. 煩悶just feels a bit annoyed. And 憂悶is seldom used. It is not necessary to learn how to use it. You will know it when you see it.
e.g.
1. 當我心情沈悶（煩悶）時，我會找事情做來轉移注意力。
2. 找不到女朋友讓他很沈悶（煩悶）。
e.g.
1. 當我心情沈悶（煩悶）時，我會找事情做來轉移注意力。
2. 找不到女朋友讓他很沈悶（煩悶）。,沈悶and煩悶are synonyms. They are almost the same. 煩悶just feels a bit annoyed. And 憂悶is seldom used. It is not necessary to learn how to use it. You will know it when you see it.
e.g.
1. 當我心情沈悶（煩悶）時，我會找事情做來轉移注意力。
2. 找不到女朋友讓他很沈悶（煩悶）。
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