麻烦用英文解释peer-group pressure,尽量详细~谢谢哦~

per-group pressure:
1, Peer pressure is a term describing the pressure exerted by a peer group in encouraging a person to change their attitude, behavior and/or morals, to conform to, for example, the group's actions, fashion sense, taste in music and television, or outlook on life. Social groups affected include membership groups, when the individual is "formally" a member (for example, a political party or trade union), and social cliques. A person affected by peer pressure may, or may not want to, belong to these groups. They may also recognize dissociative groups with which they would not wish to associate, and thus they behave adversely concerning that group's behaviors.
2, a set of group dynamics whereby a group of people pressures an individual to do something he or she wouldn't normally do.
3, Pressure from one's peers to behave in a manner similar or acceptable to them.