名词
中文翻译：直接证明
同义词：
['direct evidence', 'direct proof例句：1. The teacher demonstrated the concept to the students in class.（老师在课堂上向学生们演示了这个概念。）']
例句：
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1. The teacher demonstrated the concept to the students in class.
老师在课堂上向学生们演示了这个概念。
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2. The scientist conducted a direct demonstration of his theory.
科学家进行了他的理论的直接演示。
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3. The company provided direct demonstrations of its products during the trade show.
公司在贸易展上提供了其产品的直接演示。