名词
中文翻译：材料证人
同义词：
['material evidence', 'physical witness例句：1. The court accepted thematerial witness as proof of the crime.（法庭接受了作为犯罪证据的物质证人。）']
例句：
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1. The court accepted thematerial witness as proof of the crime.
法庭接受了作为犯罪证据的物质证人。
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2. The policeofficer was a material witness to the crimescene.
这位警官是犯罪现场的一名物证证人。
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3. The defendant's testimonywas crucial as a material witness to thecase.
被告的证词作为案件的关键证人，至关重要。