insert mode

基本解释

INSERT mode adds the input data to the table without changing any existing data.
INSERT 模式添加输入数据到表中，并且不会更改任何现有数据。
But all the extensions we have seen have required the user to explicitly request behavior, by issuing a Normal-mode command or typing a particular sequence in Insert mode.
但是我们所看到的扩展，都需要用户通过发布一个正常模式命令，或者在插入模式中输入一个特殊的序列，明确地请求行为。
If the key-mapping used C-R>=, copying a literal escape character from the previous line would be equivalent to typing it, and would cause the editor to instantly drop out of Insert mode.
如果键映射使用 C-R>=，那么从前面的行中复制字母转义字符就相当于输入字符，而这将会造成编辑器立刻退出 Insert 模式。