名词
中文翻译：精炼
同义词：
['improvement', 'refinement', 'improvement', 'refinement']
例句：
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1. Theengineer refined the design to meet the new specifications.
工程师对设计进行了改进以满足新规格。
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2.Refined sugar is a type of sugar that has been processed to remove impurities.
精制糖是一种经过加工以去除杂质的糖。
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3.The company's refining process has significantly improved its product quality.
公司的精炼过程显著提高了其产品质量。