down in the mouth
情绪低落或沮丧
口语·形容垂头丧气或悲伤
英文释义
feeling sad or depressed
例句
He looked down in the mouth after hearing the bad news about his exam results.
典故来源
源于嘴角下垂的悲伤表情,形象地描述人情绪低落的样子。