对于受内部限制，不能通过HTTP代理连接到外部世界和公共网络上的设备的计算机，可以使用这种技术来在那些计算机之间构建一个虚拟网络。

You can use this to build a virtual network between computers that are limited internally to connect to the outside world through an HTTP proxy, through to devices outside the public network.

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通过熟练操纵虚拟世界中的对象初学者将在这一系列的典型实例的引导中受益匪浅获得构建程序的经验。

By manipulating the objects in their virtual world, students gain experience with all the programming constructs typically taught in an introductory programming course.

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本教程将介绍如何构建一种环境，在这种环境中，您可以体验虚拟和现实两种世界的妙处。

This tutorial explains how to create an environment in which you can experience the best of both worlds.

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