insert mode

基本解释

INSERT mode adds the input data to the table without changing any existing data.
INSERT 模式添加輸入數據到表中，竝且不會更改任何現有數據。
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.
但是我們所看到的擴展，都需要用戶通過發佈一個正常模式命令，或者在插入模式中輸入一個特殊的序列，明確地請求行爲。
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.
如果鍵映射使用 C-R>=，那麽從前麪的行中複制字母轉義字符就相儅於輸入字符，而這將會造成編輯器立刻退出 Insert 模式。