Downing StreetyoudaoicibaDictYouDict[Downing Street 词源字典]
short street in London, named for British diplomat Sir George Downing (c. 1624-1684). It contains the residence of the prime minister (at Number 10), hence its metonymic use for "the British government," attested from 1781.[Downing Street etymology, Downing Street origin, 英语词源]