The London Underground is a rapid transit system in the United Kingdom，serving a large part of Greater London.

倫敦地鐵是英國的一個快速交通運輸系統，服務於倫敦的大部分地區。

The underground system is also known as the Tube，due to the charateristic shape of the subway tunnels.

地鐵系統因地鐵隧道的典型形狀也被稱為地下管道。

It all started in the mid—1800s. The Tube was the world's first underground train system，with the first section opening in 1863.

倫敦地鐵始建於19 世紀中期，是世界上最早的地下鐵路系統。它的第一段地鐵於1863年開始運營。

Since then it has grown to an underground masterpiece of 12 lines，275 stations，and over 250 miles of rail track，45% of which is underground.

自此，倫敦地鐵不斷延伸，發展成為一個包括12條線路、275個車站、鐵軌總長超過250英里的地鐵傑作，其中有45%在地下執行。

It is the fourth largest metro system in the world in terms of route miles. It also has one of the largest numbers of stations.

就路線長度而言，它是世界上第四大地鐵系統，也是車站數量最多的地鐵系統之一。

As an affordable and easy way to get around London，the Tube remains the first choice for millions of commuters each day，as well as tourists visiting the city on holidays.

作為一個走遍倫敦的經濟便捷的途徑，倫敦地鐵一直是每天數百萬通勤者以及在節假日遊歷倫敦的遊客的首選。

The Tube has been an international icon for London.

倫敦地鐵已成為倫敦的一個國際標誌。

The London Underground celebrated its 150 years of operation in 2013，with various events marking the milestone.

2013 年倫敦舉辦了各種各樣的活動，慶祝地鐵運營150週年，紀念這一里程碑。