名词中文翻译
中文翻译：已知物质
同义词：
['known element', 'known compound', 'known substance']
例句：
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1. Thechemist discovered a new type of known substance.
化学家发现了一种新的已知物质。
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2.This known substance is used in many different industries.
这种已知物质被用于许多不同的行业。
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3. The researcher found that the known substance had unexpected properties.
研究人员发现这种已知物质具有意想不到的性质。