Mexico has a population of 90 million; the capital, Mexico City, is home to 25 million of them. In Argentina, of a population of 33 million, 12 million live in the Buenos Aires metropolitan area.
像是墨西哥，全國人口九千萬，首都墨西哥市就有二千五百萬；阿根廷人口三千三百萬，首都大布宜諾艾利斯地區的人口就佔了一千二百萬。