英语翻译求高手翻译下面两句话1.根据家庭成员的构成,将所有家庭划分为单亲家庭、核心家庭、扩大家庭（三世同堂和四世同堂）2

According to the composition of family members, all the family is divided into single parent families, families, extended families (three and four generations)
Comparison of different time and the total population in different cities