缺点是除步行外，各类交通方式的平均出行时间有所增加。
One shortcoming, however, is that, except for walking, all other travel modes resulted in an increased average travel time.
这份报告还发现，相较于2007年，出行时长超过两个月的年轻旅行者数量明显增多，平均旅行时间长达58天。
The study showed an increase from 2007 in young travelers taking trips longer than two months, with the average trip lasting 58 days.
为方便市民出行，以乘客的出行时间最小为目标，得到了公交线路中途站点最优平均站距的数学模型；
In order to provide the convenience for passengers with the shortest travel time as the object, the mathematic model of optimizing average stop distance is built up.
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