名词
中文翻译：反应物
同义词：
['reactant', 'reacting substance', 'reagent']
例句：
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1. The reaction of the chemicals is what we are studying.
化学反应是我们所研究的。
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2. The chemical reactions are responsible for the formation of new compounds.
化学反应负责形成新的化合物。
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3. The reaction of the gases with water produces a cloud of steam.
气体与水的反应产生一团团蒸汽。