动词
中文翻译：Unknown
同义词：
['blocked', 'frustrated', 'discouraged']
例句：
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1. I was stumped when I tried to solve the math problem.
当我试图解决数学问题时，我完全不知所措。
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2. The project was stalled due to lack of funding.
由于缺乏资金，该项目停滞不前。
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3. Her performance was stifled by criticism from her colleagues.
她的表演因同事的批评而受到抑制。