改写润色下面文字： The table gives us three pieces of information about subway networks in six cities— the date that the system first opened the total number of kilometers each system has and the number of pas

The table provides us with three pieces of information regarding subway networks in six cities: the date of their establishment, the total length of each system, and the annual number of passengers. Upon analysis, we can discern that London was the first city to have a metro in 1863, while Los Angeles was the most recent in 2001. London also boasts the longest route, while Kyoto and Los Angeles have the shortest routes and the least passengers per year. Interestingly, Tokyo, with only 155 kilometers of route, had the most passengers per year in 1927. It appears that the earlier a railway was opened, the longer its route and the higher the number of passengers per year. However, Tokyo defies this pattern by serving the most passengers per year despite its relatively short route. In conclusion, the underground railway systems in various cities differ significantly in terms of their size, number of passengers, and age.