名词
中文翻译：后退标记
同义词：
['retrograde mark', 'retrograde line', 'backward mark']
例句：
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1. The team decided to back-step in the game to avoid a potential collision.
球队决定在比赛中后退一步以避免潜在的碰撞。
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2.The scientist used a back-step mark to indicate the location of an important experiment.
科学家使用一个倒退标记来指示重要实验的位置。
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3. The car's brakes were back-step marks on the road, causing confusion for drivers.
汽车的刹车痕迹是道路上的倒退标记，给司机们造成了困惑。