along with them goes social mobility,ambition to rise in the urban world,a main factor in bringing down the births in europe in the nineteenth century.
参考答案:
要点:这是一个完全倒装句,主语是social mobility,ambition to rise in the urban world,a main factor in bringing down the births in europe in the nineteenth century,谓语动词是goes。ambition to rise in the urban world是对social mobility的进一步说明。a main factor在意思上相当于which is a main factor in bringing down the births in europe in the nineteenth century,修饰ambition to rise in the urban world。