名词
中文翻译：未记录收入
同义词：
['unreported income', 'undocumented income']
例句：
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1. Thecompany's unrecorded income hasbeen a significant source of revenue for thepast year.
公司的未记录收入在过去一年内一直是一个重要的收入来源。
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2. The government is investigatingthe sources of unrecorded income toprevent tax evasion.
政府正在调查未记录收入的来源，以防止逃税。
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3.Many small businesses rely on unrecordedincome to survive during economic downturns.
在经济衰退期间，许多小企业依赖未记录收入来生存。