The next four chapters get into some of the advanced technologies that Rails work with, such as Ajax, security issues, advanced topics, and plugins.
后面四章详细说明了Rails所涉及到的一些先进技术，例如Ajax、安全问题、高级主题，以及插件。
Chapter 15 includes several advanced development topics, among them security, IPC, advanced graphics techniques, and user-hardware interactions.
第15章包含了几个高级开发主题，它们是安全、IPC、高级图像技术，和人机交互。
Chapter 15 includes several advanced development topics, among them security, IPC, advanced graphics techniques, and user-hardware interactions.
第15章包含了几个高级开发主题，它们是安全、IPC、高级图像技术，和人机交互。
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