步骤4：安装和测试。

Step 4: Installation and testing.

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我花了三个星期多一点就完成安装和测试程序。

It took a little more than three weeks to complete the installation and testing procedures.

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为了试验本教程中的代码，需要安装和测试下列软件

To follow along with the code in this tutorial, you will need to have the following software installed and tested.

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