名词
中文翻译：物质的签名同义词
同义词：
['signature', 'mark', 'imprint']
例句：
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1. The chemical analysis of the sample provided a unique speciment signature that couldbe used to identify the source of the material.
对样本的化学分析提供了一种独特的物质签名，可以用来识别材料的源头。
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2.The scientist discovered a new species with a distinct speciment signature that was not previously known.
科学家发现了一种新的物种，具有一个独特的物质签名，之前未知。
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3. The government has released a new report detailing the speciment signatures found on the alien spacecraft.
政府发布了一份新报告，详细说明了在外星人飞船上发现的物证签名。