Suburban expansion to cheap land, for the last 50 years -- you know the cheap land out on the edge -- has helped generations of families enjoy the American dream.
能负担得起在市郊生活呢？ 把市郊扩大到便宜的土地去， 在过去的五十年里－－ 便宜的土地也基本耗尽了－－ 帮助了几代人 享受美国梦．