今天的天气很沉闷。
jīntiān de tiānqì hěn chénmèn 。
The weather today is very oppressive.
他看起来很沉闷，似乎心情不好。
tā kànqǐlái hěn chénmèn ， sìhū xīnqíng bùhǎo 。
He looks very depressed; it seems he's not in a good mood.
这个地方的气氛总是很沉闷。
zhègè dìfāng de qìfēn zǒngshì hěn chénmèn 。
The atmosphere in this place is always very heavy.