She is relishing the day the new subway lines are connected, slicing even more money and time off her journey.
她回味新的地铁线连通的今天，她的旅途变得更加节省金钱和时间。
For the traffic, it is very convenient for people to travel around Beijing, because several new subway lines have been built.
对于交通，方便人们环游北京，因为一些新的地铁线路。
The first line of New York's subway opened on Oct. 27, 1904, and now its 26 lines and 468 stations offer service throughout the city's five boroughs.
纽约的第一条地铁线路在1904年10月27日开始运行，现在有26条线路和468站，提供的服务编辑全市的5个区。
We can make this clearer by considering the graph whose vertices are the stations of the London Underground and the New York Subway, and whose edges are the various lines joining them;
我们可以举一个例子，更清楚地认识这一问题，如果我们把图中的顶点看成是伦敦的地铁站和纽约的地铁站，边表示连接地铁站之间的连线；
We can make this clearer by considering the graph whose vertices are the stations of the London Underground and the New York Subway, and whose edges are the various lines joining them;
我们可以举一个例子，更清楚地认识这一问题，如果我们把图中的顶点看成是伦敦的地铁站和纽约的地铁站，边表示连接地铁站之间的连线；
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