Ontario       
noun uk/ɒnˈteə.ri.əʊ/ us/ɑːnˈter.i.oʊ/
 安大略省(位于加拿大东部,首府为多伦多)
a province (= a large area that is governed as part of a country) of eastern Canada, whose capital city is Toronto
  Canada's capital, Ottawa, is also the second-largest city in Ontario, with a regional population of close to 1.5 million people. 加拿大首都渥太华也是安大略省的第二大城市,人口接近150万。 
 The tunnel crosses the Detroit River in Windsor, Ontario. 这条隧道在安大略省的温莎市跨越底特律河。 
 - More examples
 - An Ontario judge ordered a court-appointed inspector to investigate.
 - Warnings of flooding continued to be posted for eastern Ontario and Quebec.
 - She is a developmental psychologist at the University of Waterloo in Ontario, Canada.
 - The Conservatives did notably well in Ontario.