You can also start a public group with invitation-only access, allowing you to control membership by having users request to join.

也可以发起一个只有受邀请的用户才能加入的公共组，这样可以通过让用户请求加入来控制成员资格。

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These attributes include file owner and group permissions, access-control lists (ACLs), and extended file attributes.

这些属性包括文件所有者及组权限，访问控制列表(acl)，以及扩展文件属性。

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Since WebSphere Commerce 5.5, the access control infrastructure has been enhanced with the policy group subscription feature.

自websphere Commerce 5.5起，访问控制基础结构得到了增强，提供了策略组订阅功能。

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The study, started in the 1970s in Matlab, compared a group with access to contraception and birth-control education to a similar group that did not have access to those things.

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Control access to the MFP and its functions at the group, individual, and activity level.

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In 1972, Campbell's university began a project to track the success of a group of preschoolers and a similar control group of kids who were not given access to preschool.

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