情绪低落sluggish
这两天他老那么蔫不唧，是不是哪儿不舒服了？
He's been really sluggish over the last couple of days — could it be that there's something wrong?
不声不响silent
我还想跟他说话，可他蔫不唧地走了。
I still wanted to speak to him, but he left without saying a word.
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