形容词
中文翻译：沮丧的
同义词：
['disappointed', 'disheartened', 'discouraged']
例句：
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1. He felt frustratedwhen he couldn't find the key to his car.
当他找不到车钥匙时，他感到沮丧。
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2. The failure of the project left her frustrated and disappointed.
项目的失败让她感到沮丧和失望。
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3. The teacher was frustrated by the students' lack of attention during the presentation.
老师对学生在演示中的不关注感到沮丧。