名词
中文翻译：中间灰色的物质
同义词：
['substance', 'matter', 'substance例句：1. The scientist discovered a new substance that could be used for medical purposes.（科学家发现了一种新物质，可用于医疗目的。）2. The discovery of this substance has sparked a lot of interest in the field of chemistry.（这种物质的发现在化学领域引起了极大的兴趣。）']
例句：
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1. The scientist discovered a new substance that could be used for medical purposes.
科学家发现了一种新物质，可用于医疗目的。
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2. The discovery of this substance has sparked a lot of interest in the field of chemistry.
这种物质的发现在化学领域引起了极大的兴趣。
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3.The substance was found to have properties that were not previously known.
这种物质被发现具有以前未知的性质。