名词
中文翻译：失败的信封
同义词：
['failed envelope', 'unsuccessful envelope']
例句：
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1.The failure of the project was due to a lack of funding.
项目的失败是由于缺乏资金。
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2.The failed company was sold for scrap metal.
这家失败的公司被贱卖了。
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3.The failure envelope contains all the information needed to complete the task.
失败信封包含了完成任务所需的所有信息。