动词短语
中文翻译：首次抛光
同义词：
['首次打磨例句：1. She first polished the metal before it was ready to be used.（她在金属准备好使用之前首先进行了打磨。）']
例句：
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1. She first polished the metal before it was ready to be used.
她在金属准备好使用之前首先进行了打磨。
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2.The car was first polished by a professional mechanic.
这辆车是由一位专业技师首先打磨的。
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3. Before painting the walls, they first polished them with a cloth.
在刷漆之前，他们先用布对墙壁进行了抛光。