And you must implement some custom code to render the useful data from the retrieved complex object.

并且，您必须实现一些自定义代码来呈现检索到的复杂对象中的有用数据。

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If you wish to compose an E-mail, index a database of web pages, stream a kitten video in 720p or render an explosion at 60 frames per second, you must first build a computer.

如果你想写份邮件，检索一下网页的数据库，传输一段720p的小猫视频，或以60帧每秒的速度再现爆炸场面，首先必须得有台电脑。

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To modularize your code, you must write two functions: one to render the entire blog and one to render just a single post.

要模块化代码，必须编写两个函数：一个用来呈现整个 blog；

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