名词
中文翻译：Unknown
同义词：
['response', 'reaction']
例句：
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1.The scientist observed the Etard's reaction of the substance.
科学家观察了该物质的Etard反应。
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2.The chemical reactions are responsible for the changes in the environment.
化学反应是环境变化的原因。
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3. The Etard's reaction is a complex process that requires careful monitoring.
Etard反应是一个复杂的过程，需要仔细监控。