1.3 Features overview（2）
Clean architecture; unprecedented modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a clean separation of client and server code.This makes it easy to control it from several interfaces at once: for example, you can start a VM simply by clicking on a button in the VirtualBox graphical user interface and then control that machine from the command line, or even remotely.
See chapter 1.14, Alternative front-ends, page 30 for details.
清晰的架构；前所未有的模块化。VirtualBox有高度模块化的设计、清晰明确的内部程序编程接口，其中客户端和服务器端的代码是完全分离的。这将会很容易从多个接口去控制：例如，你可以在VirtualBox的图形用户界面，通过点击一个按钮来启动一个虚拟机，然后再命令行控制台甚至远程来控制这台机器。
请查阅第1.1章，第30页。
Due to its modular architecture, VirtualBox can also expose its full functionality and configurability through a comprehensive software development kit (SDK), which allows for
integrating every aspect of VirtualBox with other software systems. Please see chapter 11,
VirtualBox programming interfaces, page 175 for details.
由于其模块化的架构，VIrtualBox可以通过全面的软件开发工具包（SDK），来充分展示其功能和可拓展性，VirtualBox可以与其他的系统软件集成在一起。请查阅第11章，VirtualBox的编程接口，175页的详细信息。
Remote machine display. The VirtualBox Remote Desktop Extension (VRDE) allows for high-performance remote access to any running virtual machine. This extension supports the Remote Desktop Protocol (RDP) originally built into Microsoft Windows, with special additions for full client USB support.
远程机器显示。VirtualBox的远程桌面扩展（VRDE）允许高性能的远程访问任何正在运行的虚拟机。扩展支持远程桌面协议（RDP）原本内置于Microsoft Windows，特别添加了对完整的客户端USB支持。
The VRDE does not rely on the RDP server that is built into Microsoft Windows; instead, it is plugged directly into the virtualization layer. As a result, it works with guest operating systems other than Windows (even in text mode) and does not require application support in the virtual machine either. The VRDE is described in detail in chapter 7.1, Remote display(VRDP support), page 95.
VRDE并不依赖于内置于Microsoft Windows的RDP，相反的，同时直接插入到虚拟化层。因此，它与其他的客户端操作系统比Windows（即使在文本模式下）也不需要虚拟机中的应用程序的支持。有关VRDE和远程显示（VRDP支持）的详细描述，在第7.1章，第95页有详细描述。
On top of this special capacity, VirtualBox offers you more unique features:
有了这个特殊功能，VIrtualBox能够为您提供更多的独特功能：
Extensible RDP authentication. VirtualBox already supports Winlogon on Windows and PAM on Linux for RDP authentication. In addition, it includes an easy-to-use SDK which allows you to create arbitrary interfaces for other methods of authentication;see chapter 7.1.5, RDP authentication, page 99 for details.
可扩展的RDP认证。VIrtualBox已经支持了Windows中的Winlogon和Linux中的PAM的RDP认证。此外，它还包括一个易于使用的SDK，该SDK允许你创建任意的接口和其他的认证方法；请查阅第7.1.5章，第99页，RDP认证。
USB over RDP. Via RDP virtual channel support, VirtualBox also allows you to connect arbitrary USB devices locally to a virtual machine which is running remotely on a VirtualBox RDP server; see chapter 7.1.4, Remote USB, page 98 for details.
RUP支持USB。通过RDP的虚拟通道的支持，VirtualBox也允许你的任意USB设备连接到本地虚拟机，该本地虚拟机运行在远程的VirtualBox的RDP服务器上；远程USB，请查阅第7.1.4章，第98页。
