名词
中文翻译：化学上的
同义词：
['chemical', 'chemistry']
例句：
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1. The chemical reaction between the two substances is very complex.
两种物质之间的化学反应非常复杂。
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2. Chemical analysis is a crucial step in determining the composition of a sample.
化学分析是确定样本组成的关键步骤。
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3. In chemistry, atoms are the fundamental building blocks of matter.
在化学中，原子是物质的基本构成单位。