This is the 3981st most frequent Chinese word.
伦敦
London.
Here, '伦敦' is used as a proper noun identifying the city.
伦敦是英国的首都。
London is the capital of the United Kingdom.
In this sentence, '伦敦' is used as a location to indicate the city visited.
我去过伦敦几次,每次都很难忘。
I have visited London several times, and each visit was memorable.
Here, '伦敦' modifies '博物馆' to specify museums located in London.