首先，让我们除去' d '——这是我们前面所使用的同一个删除行命令。
First, let's remove the 'd' — we're using the same delete line command that we've used previously.
在找到需要删除的节点之后，通过一行命令即可将其从结构中删除，但并没有从文档中删除。
Once you have found the node that needs to be removed, a single command removes it from the structure, but not the document.
DEL 命令可用于删除缓冲区中的某一行。
The DEL utility can be used to delete a particular line in the buffer.
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