今天的日子还算充实，复习了高频电子线路的第三章，顺便上知网看了看论文，其他的时间花在了知乎上。－－－－－－－每日一遍，防止颓废－－－－－－打卡2英语短文Humans beings are social animals and the family has developed as the basic unit in which human beings find belonging and security.The world changes,but the family reminds. The family is defined as a basic social group united through the bonds of kinship or massage and is present in all societies. Indeally, a family provides its members with protection,companionship, security, and socialization. Family structure and the needs it fulfills vary from society to society and from time to time. However, the most significant role of a family is to provide affection and emotion support for all its members, particularly young children.