名词
中文翻译：轨道边缘
同义词：
['rail', 'railing', 'edge of the track']
例句：
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1.The train's rail lip was scraped by a rock during the crossing.
火车在过桥时，铁轨边沿被一块石头刮伤了。
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2. The engineer inspected the rail lip for signs of wear and tear.
工程师检查了铁轨边沿，查看是否有磨损的迹象。
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3.The workers were careful not to damage the rail lip while repairing the bridge.
工人们在修理桥梁时非常小心，以免损坏铁轨边沿。