她讲述了自己如何鼓励女儿在九岁时独自一人乘坐17个小时的火车从烟台来到北京。
She describes how she encouraged her daughter, at age nine, to travel alone for 17 hours by train from their home in the eastern coastal city of Yantai to Beijing in the North.
无论是独自一人还是被他人观察时，成年人的行为方式都没有什么差别。
Adults behaved in similar ways regardless of whether they were on their own or observed by others.
我独自一人时，这些人忽然向我走来。
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