the capital or chief city of a country or region (国或地区的)首都,首府;首要城市 ■a very large and densely populated industrial and commercial city 大都会,大城市
语源
late Middle English (denoting the see of a Metropolitan): via late Latin from Greek mētropolis 'mother state', from mētēr, mētr- 'mother' + polis 'city'