动词短语
中文翻译：Unknown
同义词：
['backtrack', 'revert', 'retrace']
例句：
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1. He racked back tothe beginning of the conversation and asked hera question.
他突然回到了对话的开始，问了她一个问题。
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2. The car suddenly racked back, causing the driver to losecontrol.
汽车突然倒退，导致司机失去控制。
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3. After a long day at work,she racked back to the comfort ofher home.
工作了一整天后，她突然回到了家的舒适中。