三大航空集团的网络从单一枢纽为主向多枢纽转变，轴辐式结构更加明晰；
The networks of the "Big Three" are now shifting from single hub to multi-hubs and the adoption of hub-and-spoke structure becomes more obvious.
为了描述多枢纽选址与混合网络设计综合优化问题，引入了双层规划模型建立数学模型。
To express integrated optimization of multiple hubs location and mixed network design, a bi-level programming model was introduced for mathematical models.
当欧洲主要的航空公司关注于它们的枢纽机场，阿联酋航空公司却积极寻找二级市场，如曼彻斯特，格拉斯哥，汉堡和杜塞尔多夫。
While Europe's flag carriers concentrated on their hubs, Emirates sought secondary markets such as Manchester, Glasgow, Hamburg and Dusseldorf.
随着我国西部水电资源的快速开发利用，出现了趆来趆多中低水头的闸坝型水利枢纽。
Along with the rapid exploitation of water power resource in west of the country, more and more mid or low-head flood gate dam hinges are appearing.
在平原多沙河流上修建引水枢纽，缺乏较系统完整的经验和指导原则。
In the construction of barrage diversion works on alluvial rivers with heavy sediment load, complete systematic experience and design criteria are still lacking.
根据该算法编制的计算机程序，可实现对多径路铁路枢纽列车运行图系统中的车站、区间、列车运行径路、车站进路、列车时刻表等数据的一体化、可视化管理。
The application program based on the algorithm has passed, and the data such as stations, sections, train routes and timetables etc. can be managed entirely and visually.
广州铁路枢纽现有的货场分布过密且数量多规模小，这就造成整个枢纽效率的低下；
There are many small freight yards within Guangzhou hub, which causes the low efficiency of the whole hub.
宝鸡峡水库是修建在多泥沙河流上的水利水电枢纽工程，工程布置采用了大底孔的方案，又设置事故检修闸门。
The Baojixia Reservoir is constructed on the river with the overload flow. The large scale bottom outlet was adopted, and the emergency overhaul gate was set.
宝鸡峡水库是修建在多泥沙河流上的水利水电枢纽工程，工程布置采用了大底孔的方案，又设置事故检修闸门。
The Baojixia Reservoir is constructed on the river with the overload flow. The large scale bottom outlet was adopted, and the emergency overhaul gate was set.
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