运行一个批处理文件或者程序，它可以建立测试所需的环境并且在以后可以重置此环境。
Run a batch file or program that sets up the environment needed for a test and resets the environment afterward.
您的目标是创建一个可以使您通过单个的步骤就能运行产品安装和更新任务的批处理文件。
Your goal is to create a batch file that will allow you to run the tasks for both product installation and update in a single step.
通过调用一个批处理文件，我们可以为我们的程序设置一个合适的运行时环境。
By invoking a batch file, we can set up a suitable runtime environment for our program.
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