求翻译：虽然轨道交通经过近百年的发展完善和深入实践，系统的规划设计水平已日趋成熟，工程技术也显著很高，但轨道交通项目建设资金短缺和运营亏损的问题，仍然是一个世界性难题。是什么意思？

Although rail transport after nearly a century of development and improvement and in-depth practice, the level of planning and design of the system has matured, engineering technology also significantly high, but the shortage of rail transit project construction funds and operating losses of the pro

Although orbital traffic after nearly 100 years of development and perfection of the system and in-depth practice has matured level planning and design, engineering and technology have also been very high, but track traffic building project funding shortfalls and operating losses, the problem still

Although the orbital transportation passes through the near hundred year development perfect and the thorough practice, system plan design level already day by day mature, project technology also remarkable very high, but the orbital transportation project construction fund short and the operation l

Although rail traffic after nearly a century of development and intensive practice, systems planning and design level is becoming more mature, engineering technology and significantly high, but shortage of funds and the construction of rail transit project operating loss problem, continues to be a w

Although rail traffic after last century developed and in-depth practice, system design level has mellowed, engineering and significantly high, but rail transit project funding shortfalls and problems operating loss, remains a worldwide problem on.