England is a highly urbanized country, with 80% of its population living in cities, and only 2% of the population working in agriculture.这个句子不缺成分,请问该句子中"with"是起什么作用?我重新看了一下句子,应该是with+宾语+现在分词,整体起副词作用,不知此理解是否正确?