名词
中文翻译：预精炼
同义词：
['pre-treatment', 'pre-processing']
例句：
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1.The process of pre-refining is crucial for the quality of the final product.
预精炼过程对于最终产品的质量至关重要。
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2.In pre-refining, the oil is first heated and then filtered to remove impurities.
在预精炼过程中，首先将油加热并过滤以去除杂质。
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3. The pre-refining step helps to remove any remaining impurities that may affect the final product's quality.
预精炼步骤有助于去除可能影响最终产品质量的任何剩余杂质。