1、I don't know what's gotten into her, but she's been really maungy lately.
我不知道她怎么了，最近她一直情绪低落。
2、I try to avoid him when he's in a maungy mood because he's so difficult to deal with.
当他情绪糟糕的时候，我尽量避免和他接触，因为他很难相处。