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汉语拼音：tiě lù gàn xiàn

铁路网中具有重要地位的铁路线。凡能保证全国运输联系，并具有重要政治、经济和国防意义，或达到规定客货运量的铁路，都属于铁路干线。

• You could operate against the main line of the railway from there .

  你从那里可以袭击铁路干线。

• San Antonio lies at the crossroads of major interstate highways and railroads serving both coasts, as well as the NAFTA corridor.

  圣安东尼奥坐落于几条经过双边海岸及北美自由贸易协定区贸易通道的主要州际公路和铁路干线的交汇处。

• Socioeconomic benefit evaluation is the main precondition and foundation in railway project planning and decision.

  社会经济效益评价是铁路干线路网规划及建设项目决策的重要前提和依据。

• Nearby is a child of four, in a khaki suit, who represents the merger of two trunk line railways.

  旁边一孩童，年仅四岁，身着咔叽套装，却已是两条铁路干线联合公司的法人。

• With the whole speed-up of trains in our trunk railway system, the rate of derailment accident has been increasingly rising every year.

  随着我国铁路干线全面提速，列车的脱轨事故在每年重大事故中所占的比率居高不下。

• Some 45 cathedrals are to be restored and also several castles, alongside the usual high-speed rail lines and roads.

  除了通常的高速铁路干线和公路外，有45个教堂和一些城堡将进行修缮。

• The river flooded its banks, washing away part of the main railway line.

  洪水淹没了河岸，冲坏了部分铁路干线。

• Shanghai has a network of transportation through the whole country, with 40 airlines to cities both at home and abroad.

  黄金水道长江和沪杭、京沪铁路干线，使上海成为贯通中国东西南北的交通枢纽，40多条航空线通往国际国内各大城市。

• I crossed the continent and joined together the seas with my great railroads .

  我们修通了横贯北美大陆连接东西海岸的铁路干线。