名词
中文翻译：双重来源
同义词：
['multiple source', 'dual source']
例句：
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1.The company has two main sources of revenue: direct sales and licensing.
该公司有两个主要的收入来源：直销和许可。
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2.This project involves a double source of funding: government grants and private donations.
该项目涉及双重资金来源：政府补助金和私人捐款。
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3.The research team identified two key sources of pollution: industrial emissions and household waste.
研究团队确定了两个主要污染源：工业排放和家庭废物。