urban rail traffic的用法和樣例：
例句
- Traction calculation of trains is one the important composing of the whole urban rail traffic.
列車牽引計算是整個城市軌道交通的重要組成部分。 - This paper analyzes the network development of Shanghai UMT, discusses the systematic characters of Shanghai urban passenger traffic.
摘要論述了上海城市軌道交通的網路化發展，討論了上海城市客運交通的系統特性。
