名词
中文翻译：已证明的致癌物
同义词：
['confirmed carcinogen', 'proven carcinogen', 'confirmed carcinogenic agent']
例句：
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1. The study found that exposure to certain chemicals can be a risk factor for developing cancer.
研究发现，某些化学物质暴露可能是患癌症的风险因素。
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2. The company has been accused of using proven carcinogens in their products.
该公司被指控在其产品中使用了已知的致癌物质。
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3. The researcher warned that the use of proven carcinogens could have serious health consequences.
研究人员警告说，使用已知的致癌物质可能对健康造成严重的后果。