路由器会为我们解析和生成url，以便在多个视图间导航时，可以自由使用相对路径和绝对路径。
The router parses and builds the URL for us, allowing us to use relative and absolute paths when navigating between application views.
您看到了如何使用绝对路径和相对路径更改目录，如何显示所在的工作目录，以及如何在两个目录之间来回切换。
You saw how to change directories using the absolute path and the relative path, and you learned how to display the working directory you are in and toggle back and forth between two directories.
本文首先展示一些简单的cd示例，然后解释什么是绝对路径和相对路径，以及何时使用它们。
After looking at some simple CD examples, the article explains what is meant by the absolute path and the relative path and when to use each one.
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