名词
中文翻译：油脚
同义词：
['oil mark', 'oil spot']
例句：
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1.The oil foot on the floor was a clear indication of recent use.
地板上的油迹清晰地表明了最近有人使用过。
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2.The oil foot on the table was a sure sign of someone having been there recently.
桌子上的油迹是某人最近来过的明显证据。
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3. The oil foot on the wall was a reminder of the previous owner's presence.
墙上的油迹是前主人存在的提醒。