名词
中文翻译：底物
同义词：
['substrate', 'substrate', 'substrate', 'substrate']
例句：
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1.The enzyme is essential for the reaction to occur.
酶对于反应的发生是必要的。
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2. The experiment was conducted on a variety of substrates.
实验在多种底物上进行。
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3. The growth of bacteria depends on the availability of nutrients in the substrate.
细菌的生长依赖于底物中营养物质的可用性。