即使应用运行快速和响应及时，这任然可能惹恼用户。
Even if your application is fast and responsive, it can still annoy users.
它们强迫我们从两个维度来思考问题：空间的和水平的。 高大的机构下达命令，却没有响应；扁平的机构响应及时，却混乱失控。
They force us to think - spatially and literally - in two dimensions: tall organizations command unresponsively, and flat organizations respond uncontrollably.
您将学到一些技术，这些技术将帮助您创建响应及时、持续更新的web应用程序，这些应用程序既能保护服务器资源，又能提供良好的用户体验。
You'll learn techniques that allow you to create responsive, continually updated web applications that conserve server resources while providing a slick user experience.
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