They range from informal groups of friends or colleagues who meet in someone's home or at the local pub, to discuss a book.
书友会形式多样，可以是几个朋友或者一些同事在某人家里的非正式聚会，也可以是在酒吧里讨论某本书。
There exist some informal groups in library.
图书馆存在着一些非正式群体。
As the objective existence in university classes, informal groups have both positive and negative influence on organization.
高校班级中非正式群体是一种客观存在，它们对组织有正反两方面的作用。
The role of informal groups of university students has both positive and negative effects and it is very necessary to intervene appropriately.
大学生非正式群体既有积极作用也有消极作用，对其进行适当干预很有必要。
It is a hot topic for educators how to recognize and guide informal groups in high school.
如何正确认识，有效的教育引导高中学生非正式群体是摆在广大教育工作者面前的一个现实问题。
Online virtual communities among college Students are informal groups who hold the computer network as the platform for communication and association.
大学生网络虚拟群体是以电脑网络为沟通、联系平台建立的非正式群体。
Informal groups become smaller; attendance drops off in little organizations, and the organizations themselves wither.
私下的圈子变得更小了，小的组织参加的人数在变少，而这些小组织自己也在消失。
Informal groups become smaller; attendance drops off in little organizations, and the organizations themselves wither.
私下的圈子变得更小了，小的组织参加的人数在变少，而这些小组织自己也在消失。
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