london underground system

基本解释

Universal Pictures also said that the posters were not placed near schools and appeared in the London Underground system, which does not have a high proportion of children.
此外，"环球影业"称，宣传海报并没有在学校附近出现，而是投放在儿童很少出现的伦敦地铁里。
London – the oldest. The first line was thepartially underground Metropolitan Railway Line which opened in 1863, and isnow a part of the more expansive London Underground system.
最古老的地铁——伦敦地铁。开通于1863年的伦敦市地下铁路是伦敦地铁的前身。这一段开通于那个年代的地铁已经成为了正在日益扩张的伦敦地铁系统的一部分。
The first line was the partially underground Metropolitan Railway Line which opened in 1863, and is now a part of the more expansive London Underground system.
开通于1863年的伦敦市地下铁路是伦敦地铁的前身。这一段开通于那个年代的地铁已经成为了正在日益扩张的伦敦地铁系统的一部分。

London may be famous for its red double-decker buses, but it is the underground system, parts of it more than a hundred years old, that is especially vulnerable.

What's been so interesting here in the UK is this time around - unlike after the July the 7th bombings on the London underground system - everyone universally and rightly has condemned this barbaric act.
NPR: Violence In Europe Leaves People Fearful
Mr Prescott says that much larger sums are needed to provide London with an underground system fit for the 21st century.
ECONOMIST: London Underground