人口多,距离远(驾驶太疲劳)时才需要高铁,自动驾驶如果实现了,这个问题就解决了,还和local链接顺带也解决了
回答: 高铁和航空的一个区别是upgrade的难易和成本。高铁要upgrade很困难,不仅要upgrade列车,也要upgrade全线
由 Porcelana
于 2018-07-01 20:23:39
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