一个证书存储是一个存档文件，它包含绝大部分数字证书，或者是由不同证书权威机构发布的证书。
A certificate store is an archive file that contains almost any number of digital certificates, possibly certificates that are issued from different certificate authorities.
可信的证书权威机构发布数字证书，它们被用来鉴别用户和组织访问Web站点，e - mail服务器和其他安全系统的权限。
Trusted certificate authorities issue digital certificates, which are then used to authenticate users and organizations for access to Web sites, E-mail servers, and other secure systems.
PAC 版本应该由颁发证书的权威机构进行维护；当用户组的成员关系发生变化时，版本也应该变化。
PAC versions should be maintained by the certificate-issuing authority; the version should change when the user's group membership information changes.
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