master copy

基本解释

Teams use a Stream to store the master copy of project files; each repository workspace holds a copy.
团队使用主开发流（Stream）来存储项目文件的主副本；每个存储库工作区包含一个副本。
After upgrading the configuration on the deployment manager, the local repository of the node is synchronized with the master copy from the deployment manager.
在将部署管理器上的配置升级之后，本地的节点存储库就会与部署管理器上的原版拷贝同步。
By simply copying the array reference instead of cloning it, both the message and the class that produces it hold a reference to the master copy of the previous bids array.
通过简单地复制而不是克隆数组引用，消息和产生消息的类都保存了前一投标数组的主副本的一个引用。

And the ebook and the printed version will come from the same master copy of that subbed and perfect version.
FORBES: Why Are Ebooks Riddled With Typos?
When all the finishing touches are complete, the master copy of the movie will reside not as a film negative but as a computer file, several terabytes in size (exactly how many terabytes, no one yet knows).
FORBES: Attack Of The Digital Movie