English to Chinese Tech/Engineering IT (Information Technology)

A rich client runs small applications on the desktop to work with data locally or draw on outside resources. It can communicate with a server, telling it to accept uploaded data or to send real-time data that users need. It also can reconfigure the part of the browser in which the user is working, downloading additional elements to expand the application where the user is showing interest.
试译：
富客户端在桌面系统上运行小的应用软件，以便在本地处理数据，还可以利用外部资源。它可以与服务器进行通信，要求对方接收上传数据，或者发送用户需要的实时数据。它还可以重新配置浏览器当中用户正在操作的那部分，下载另外的基本模块（插件？），扩充用户有兴趣的应用的性能。
具体指什么？