Based on RBAC model, the paper adds user group, role group to extend the model from user, role and permission.

在RBAC模型的基础上引入用户组、角色组的概念，从用户、角色和权限三个方面对R BAC模型进行了扩展。

youdao

Drupal administrators don't have to set up permissions for each user. Instead, they assign permissions to roles and then group like users into a role group.

Drupal管理员不需要为每个用户设置权限，而是把权限分配给角色，然后把用户分组到角色组中。

youdao

By sharing the role, the group can travel great distances.

通过分享角色，团队可以走得很远。

youdao

She wrote that women have the major role in one group in New Guinea without causing any special problems.

VOA: special.2010.01.17

There is clearly some kind of an official group that has some sort of political role to play, which is popular in its character.

很显然需要有一个官方组织,扮演某种政治角色,从属性上来说这很常见

耶鲁公开课 - 古希腊历史简介课程节选

I think the answer is that both play a role but some of the effects are due to stereotypes above and beyond in-group favoritism.

我想两者都有,但刻板印象的影响,要高于组内偏爱。

耶鲁公开课 - 心理学导论课程节选

It pays to find out what role each group member plays.

FORBES: How To Sell Almost Anything

The researchers were able to control where in a group an individual ranked by the order in which it was introduced into its group (newly introduced monkeys almost always adopt a role subordinate to existing group members).

ECONOMIST: Social status and health

After a seminar at Elk Creek Ranch in Idaho, Williams reversed his role, the group charged.

CNN: Report: Judge junkets may taint environmental rulings