Line 4 - This gets the list of all installed packages.
第4行—获得所有已安装的包的列表。
One is History, giving you a detailed list of the packages you've installed or upgraded.
其中一项是历史记录，它提供了已经安装或者升级的软件包的详细信息。
The text file "applications" will appear on the Desktop, containing a complete list of all the packages installed using Ubuntu tools. It will not include anything you have downloaded from web sites.
在桌面上就会出现一个叫“applications”的文本文件了，它里面列出了使用Ubuntu工具安装的全部软件包。
List all packages that were explicitly installed (ie, not pulled in as a dependency by other packages) and are not required by any other packages.
列出没有正确安装的所有包(比如，没有被其他包作为一种依赖)，没有被其他的包需求。
Depending on the packages you opted to install, you'll be presented with a list of required packages that also need to be downloaded and installed.
根据不同的包是你选择安装，您就提交了一份名单，要求封装，还需要下载和安装。
Depending on the packages you opted to install, you'll be presented with a list of required packages that also need to be downloaded and installed.
根据不同的包是你选择安装，您就提交了一份名单，要求封装，还需要下载和安装。
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