The reasons for the differences are social development, generation gap, and the role of different age groups.

存在差异的原因在于社会的变化，代沟，不同年龄的社会角色。

youdao

The reasons for the differences are social development, generation gap, and the role of different age groups.

存在差异的原因在于社会的变化，代沟，不同年龄的社会角色。

youdao