名词
中文翻译：许可材料
同义词：
['controlled substance', 'controlled substances', 'controlled materials']
例句：
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1. The manufacturer mustensure that all materials used in the production process are licensed.
制造商必须确保生产过程中使用的所有材料都是经过许可的。
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2.The government has strict regulations on the use of licensed materials in construction projects.
政府对建筑项目使用受控材料有严格的规定。
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3.The research team collected a variety of licensed materials to study their properties.
研究团队收集了多种受控材料来研究其性质。