名词
中文翻译：Unknown
同义词：
['downhearted', 'disheartened', 'dejected']
例句：
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1. He was so disappointed that he couldn't muster the energy to start his new project.
他非常失望，以至于没有精力开始他的新项目。
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2. The team's performance was downhearted after their last defeat.
团队在上次失败后士气低落。
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3. Her face fell as she realized she had made a terrible mistake.
当她意识到她犯了一个可怕的错误时，她的脸色变得沮丧。