系统还能告诉我们，用户取车与还车的地点，骑车时间有多久。
The system can also tell us which user removed that bike and, when it’s returned, how long they had been riding.
系统还能告诉我们，用户取车与还车的地点，骑车时间有多久。
The system can also tell us which user removed that bike and, when it's returned, how long they had been riding.
据一个德国教授说，疼痛来自以不平常的方式拉伸你的肌肉，例如，骑上自行车兜风会疼痛，因为你已经很长时间没骑车了。
According to a German professor, the soreness comes from straining your muscles in an uncommon way, for example, jumping on a bicycle for a ride, because you haven't ridden in a long time.
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