urban railway train的意思|示意

The railway vehicle housing the contents of which are advertisements is invented, but the present urban track bus trolley and the present subway train are not included.

发明内容有广告的轨道车辆外壳，但不包括现有的城市有轨公交电车、现有的地下铁道列车。

This paper describes line characteristic of urban railway with mathematics methods, with the same interval time of train running as target function to make mathematics model of urban railway.

阐述了匈牙利法的基本思想和基本原理，并与铁路列车运行实际情况相结合，根据铁路列车乘务组分派的基本特点建立数学模型，并用匈牙利法对其进行求解。