名词
中文翻译：油石
同义词：
['stone', 'stoner例句：1. He used to use an ostein to smooth his face before going out.（他过去用一个油石来打磨自己的脸，出门前。）2. The old man was using an ostein to polish his shoes.（那位老人正在用油石擦他的鞋子。）']
例句：
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1. He used to use an ostein to smooth his face before going out.
他过去用一个油石来打磨自己的脸，出门前。
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2. The old man was using an ostein to polish his shoes.
那位老人正在用油石擦他的鞋子。
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3.She bought a new ostein for her car.
她为她的车买了一个新的油石。