1. Many young Americans do not live with their families, but in apartment blocks or residential areas where everyone is more or less of the same age.
很多年轻的美国人不和自己的家人住在一起，而是住在和自己年龄相仿的人聚集的公寓区或住宅区。

residential 住宅的,与居住有关的，如：

A village of northeast Illinois, a residential and industrial suburb of Chicago. Population32,058.
艾迪生美国伊利诺斯州东北部一村落，芝加哥的居住区及工业区。人口32，058


2. Young married couples may move to new suburbs where most people have young families.
年轻的新婚夫妇可能会搬到新人聚集的新开发的郊区居住。

suburbs 郊外，如：

Many blank spaces are still left in the suburbs.
郊区仍留有许多空地。

3. Many live in old people's homes. Some live in special towns, built for old people, where there are no young children and the atmosphere is quiet.
有些老人住在专为老年人修建的小镇上，那里没有小孩，非常安静。

atmosphere 大气,气氛，如：

The peoples are in a festal atmosphere.
各族人民都沉浸在节日的气氛之中。