down in the mouth

例句：

1. 1. She lookeddown in the mouth as she realized hermistake.
   她意识到自己的错误时，显得沮丧。
2. 2. The team was downin the mouth after their lastdefeat.
   在上次失败后，团队陷入了沮丧。
3. 3. He felt down in the mouth whenhe heard the bad news.
   他听到那个坏消息时，感到沮丧。