I'm so depressed. 我很郁闷。
I feel so upset. 我觉得很沮丧。
I'm in a bad mood today. / I'm moody today. 我今天心情不好。
I feel kind of blue today. 我今天有点「郁闷」。
I feel low today. 我今天心情（有点）低落。
I'm so down. 我心情很低落。
I'm a bit down in the mouth today. 我今天有点闷闷不乐的。
I've been down in the dumps recently. 我最近很「郁闷」。
I can't put my finger on what's wrong. 我不晓得什么地方不对劲儿。
Sorry, I got up on the wrong side of the bed today. 抱歉，我今天心情不好。
I don't feel like doing anything.我提不起精神来做事。
I got the short end of the stick。 这实在是我所能遇到最糟的情况了。
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