现代多人游戏体验需要在世界范围内的大量客户端间同步庞大数据。对于向用户提供引人入胜的体验而言，发送数据的类型和方式至关重要，因为其会极大影响项目的执行和质感。在虚幻引擎中，在客户端与服务器间同步数据和调用程序的过程被称为 复制（Replication） 。复制系统同时提供了较高层次的抽象物以及低层次的自定义，以便在创建针对多个并发用户的项目时更加方便地处理可能遇到的情况。
Welcome to the new Unreal Engine 4 Documentation site!
We're working on lots of new features including a feedback system so you can tell us how we are doing. It's not quite ready for use in the wild yet, so head over to the Documentation Feedback forum to tell us about this page or call out any issues you are encountering in the meantime.
We'll be sure to let you know when the new system is up and running.
