支持根是从树的主干长出，悬垂向下再深入软泥中，而支持根本身还在分支成更多的支持根，最后形成连续向四周延伸的根盘。
分部类必须派生自支持根元素的类型。
The partial class must derive from the type that backs the root element.
它是一个相当复杂的树的根，这个树支持在不同的主机上、针对多个目标构建代码。
It is the root of a fairly complex tree that can support building on different hosts for multiple targets.
但是，可能需要查看发行版的文档，确保系统支持LVM2根文件系统。
But you may want to browse through your distro documentation and make sure that LVM2 root filesystems are supported.
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