translate english version

en/chapter03.md

@@ -1,91 +1,99 @@
 # Chapter 3: Modifying and Saving Files
 
-## 修改文档
+## Modify the document
 
-你现在已经学会了控制光标、打开文件、切换文件、并在文件中查找内容，这些操作都是在
-Vim 的 normal 模式下进行的。现在，是时候进入 Vim 的另外一种模式 —— insert 模式，
-学习一下如何修改文件了。
+You have learned how to control the cursor, open files, switch files, and find
+content in files. These operations are all performed in Vim's normal mode. Now,
+it's time to enter another mode of Vim - insert mode, and learn how to modify
+the file.
 
-### 插入
+### Insert
 
-- `i` 当前字符前插入
-- `a` 当前字符后插入
-- `I` 行首插入
-- `A` 行尾插入
-- `o` 在下一行插入
-- `O` 在上一行插入
+- `i` insert before the current character
+- `a` insert after the current character
+- `I` insert at the beginning of the line
+- `A` insert at the end of the line
+- `o` insert in the next line
+- `O` insert in the previous line
 
-_注意：以上任何一个命令都会使 Vim 进入 insert 模式，进入该模式后光标会发生变化，
-这时输入的文字会直接出现在文档中，按 `Esc` 键或 `Ctrl-[` 或 `Ctrl-C` 退出 insert
-模式。_
+_Note: Any of the above commands will cause Vim to enter insert mode. After
+entering this mode, the cursor will change, and the text you enter will appear
+directly in the document. Press `Esc` or `Ctrl-[` or `Ctrl-C` to exit insert
+mode._
 
-### 删除（并保存到 Vim 剪贴板）
+### Delete (and save to Vim clipboard)
 
-- `s` 删除当前字符，并进入 `INSERT` 模式
-- `S` 删除当前行并保存到 Vim 剪贴板，同时进入 `INSERT` 模式（等同于 `cc`）
-- `x` 删除当前字符，相当于 insert 模式下的 `Delete`
-- `X` 删除前一个字符，相当于 insert 模式下的 `Backspace`
-- `dd` 删除当前行，并将删除的内容保存到 Vim 剪贴板
-- `d<X>` 删除指定内容并保存到 Vim 剪贴板
-- `cc` 删除当前行并保存到 Vim 剪贴板，同时进入 `INSERT` 模式
-- `c<X>` 删除指定内容并保存到 Vim 剪贴板，同时进入 `INSERT` 模式
+- `s` delete the current character and enter `INSERT` mode
+- `S` delete the current line and save it to the Vim clipboard, and enter
+  `INSERT` mode (equivalent to `cc`)
+- `x` delete the current character, equivalent to `Delete` in insert mode
+- `X` delete the previous character, equivalent to `Backspace` in insert mode
+- `dd` delete the current line and save it to the Vim clipboard
+- `d<X>` delete the specified content and save it to the Vim clipboard
+- `cc` delete the current line and save it to the Vim clipboard, and enter
+  `INSERT` mode
+- `c<X>` delete the specified content and save it to the Vim clipboard, and
+  enter
 
-_说明： `<X>` 部分是对操作内容的描述，如果要删除一个单词，就输入 `dw` 或者
-`de`，要复制当前位置到行尾的内容，就输入 `y$`，要删除后面 3 个字符并插入，就输入
-`c3l` 诸如此类。_
+_Note: The `<X>` part is a description of the operation content. If you want to
+delete a word, enter `dw` or `de`. If you want to copy the content from the
+current position to the end of the line, enter `y$`. If you want to delete the
+next 3 characters and insert them, enter `c3l`, and so on._
 
-### 复制
+### Copy
 
-- `yy` 复制当前行到 Vim 剪贴板
-- `y<X>` 复制指定内容到 Vim 剪贴板
+- `yy` copy the current line to the Vim clipboard
+- `y<X>` copy the specified content to the Vim clipboard
 
-### 粘贴
+### Paste
 
-- `p` 在当前位置后粘贴
-- `P` 在当前位置前粘贴
+- `p` paste after the current position
+- `P` paste before the current position
 
-### 合并
+### Merge
 
-- `J` 将当前行与下一行合并
+- `J` merge the current line with the next line
 
-> 尝试在下面的文本中进行复制粘贴练习
+> Try copying and pasting in the text below
 
 ```
-删除这一行
-粘贴到这一行下面
-剪切 ABC 并把它粘贴到 XYZ 前面，使这部分内容看起来像
-剪切 并把它粘贴到 ABC XYZ 前面。
+Delete this line
+Paste below this line
+Cut ABC and paste it in front of XYZ to make this part look like
+Cut and paste it in front of ABC XYZ.
 ```
 
-### 替换
+### Replace
 
-- `r<X>` 将当前字符替换为 X
-- `gu<X>` 将指定的文本转换为小写
-- `gU<X>` 将指定的文本转换为大写
-- `:%s/<search>/<replace>/` 查找 search 内容并替换为 replace 内容
+- `r<X>` replace the current character with X
+- `gu<X>` convert the specified text to lowercase
+- `gU<X>` convert the specified text to uppercase
+- `:%s/<search>/<replace>/` find the search content and replace it with the
+  replace content
 
-> 尝试修改下列文本的大小写
+> Try changing the case of the following text
 
 ```
 Change this line to UPPERCASE, THEN TO lowercase.
 ```
 
-> 还有个更好玩的命令 `g~<X>`，先将光标定位到上面那行文本，执行 `0g~$` 看看发生了
-> 什么。
+> There is a more interesting command `g~<X>`, first locate the cursor to the
+> line of text above, execute `0g~$` to see what happened.
 
-### 撤销、重做
+### Undo, Redo
 
-- `u` 撤销
-- `Ctrl-r` 重做
+- `u` undo
+- `Ctrl-r` redo
 
-### 保存文件
+### Save file
 
-- `:w` 保存当前文件
-- `:wa` 保存全部文件
-- `:wq` or `ZZ` 保存并退出
-- `:q!` or `ZQ` 强制退出，不保存
-- `:saveas <new filename>` 文件另存为
-- `:w <new filename>` 文件另存一份名为 `<new filename>` 的副本并继续编辑原文件
+- `:w` save the current file
+- `:wa` save all files
+- `:wq` or `ZZ` save and exit
+- `:q!` or `ZQ` force exit without saving
+- `:saveas <new filename>` save the file as `<new filename>`
+- `:w <new filename>` save a copy of the file as `<new filename>` and continue
+  editing the original file
 
-> 你可以试着把当前（也许已经改得面目全非的）文件另存一份，然后继
-> 续[下一章](chapter04.md)的学习。
+> You can try to save the current (perhaps already changed beyond recognition)
+> file as a copy, and then continue learning the [next chapter](chapter04.md).

en/chapter04.md

@@ -1,100 +1,119 @@
 # Chapter 4: Some Tips
 
-## 简单设置 Vim
-
-“工欲善其事，必先利其器”。尽管 Vim 非常强大，但默认配置的 Vim 看起来还是比较朴素的，为了适合
-我们的开发需求，要对 Vim 进行一些简单的配置。
-
-- `:set number` 显示行号
-- `:set relativenumber` 显示相对行号（这个非常重要，慢慢体会）
-- `:set hlsearch` 搜索结果高亮
-- `:set autoindent` 自动缩进
-- `:set smartindent` 智能缩进
-- `:set tabstop=4` 设置 tab 制表符所占宽度为 4
-- `:set softtabstop=4` 设置按 `tab` 时缩进的宽度为 4
-- `:set shiftwidth=4` 设置自动缩进宽度为 4
-- `:set expandtab` 缩进时将 tab 制表符转换为空格
-- `:filetype on` 开启文件类型检测
-- `:syntax on` 开启语法高亮
-
-这里列出的是命令，你可以通过在 Vim 中输入进行设置，但这种方式设置的参数只在本次关闭 Vim 前生效，
-如果你退出 Vim 再打开，之前的设置就失效了。
-
-若要永久生效，需要修改 Vim 的一个自动配置文件，一般文件路径是 `/home/<user>/.vimrc`（Linux
-系统）或 `/Users/<user>/.vimrc`（Mac OS 系统）
-
-如果没有就新建一个，以 Mac OS 系统为例：
-
-> 在控制台执行如下命令，每行结尾记得回车
+## Simple setup of Vim
+
+"Work well, must first sharpen his tools." Although Vim is very powerful, the
+default configuration of Vim looks relatively simple. In order to meet our
+development needs, we need to do some simple configuration to Vim.
+
+- `:set number` display line number
+- `:set relativenumber` display relative line number (this is very important,
+  slowly experience)
+- `:set hlsearch` search result highlight
+- `:set autoindent` automatic indentation
+- `:set smartindent` smart indentation
+- `:set tabstop=4` set tab tab width to 4
+- `:set softtabstop=4` set the width of the indentation when pressing `tab` to 4
+- `:set shiftwidth=4` set the automatic indentation width to 4
+- `:set expandtab` indent tab to space
+- `:filetype on` open file type detection
+- `:syntax on` open syntax highlighting
+
+Here are the commands that you can use to set up Vim, but the parameters set in
+this way only take effect before closing Vim this time. If you exit Vim and open
+it again, the previous settings will be invalid.
+
+If you want to take effect permanently, you need to modify an automatic
+configuration file of Vim. The general file path is `/home/<user>/.vimrc` (Linux
+system) or `/Users/<user>/.vimrc` (Mac OS system)
+
+If not, create a new one. Take Mac OS system as an example:
+
+> Execute the following command in the console, remember to press Enter at the
+> end of each line
 
 ```bash
 cd ~
 vim .vimrc
 ```
 
-> 现在你已经在 Vim 中打开了你的 Vim 专属配置文件，将上面提到的配置复制到你的文件中，记得要删除
-> 每行开头的 `:`
+> Now you have opened your Vim exclusive configuration file in Vim, copy the
+> configuration mentioned above to your file, remember to delete the `:` at the
+> beginning of each line
 >
-> 修改完成执行 `:wq` 或者 `ZZ` 保存退出，再次进入 Vim 时，你的这些配置就已经生效了
+> After the modification is completed, execute `:wq` or `ZZ` to save and exit.
+> When you enter Vim again, your configuration should take effect
 >
-> 当然，机智如我也为你准备好了一份 [vimrc](vimrc.vim) 样本文件，你可以在控制台执行
-> `cp vimrc.vim ~/.vimrc` 直接使用，再次启动 Vim 或在 Vim 中执行  `:source ~/.vimrc`你的配置就
-> 应该生效了。
+> Of course, I have prepared a sample file [vimrc](vimrc.vim) for you. You can
+> use it directly by executing `cp vimrc.vim ~/.vimrc`, and start Vim again or
+> execute `:source ~/.vimrc` in Vim. Your configuration should take effect.
 
-_**[ AD ]** 当然你也可以在我维护的另外一个项目 [The 7th Vim](https://github.com/dofy/7th-vim) 中找到一个更为完整的配置方案。_
+_**[AD]** Of course, you can also find a more complete configuration scheme in
+another project maintained by me
+[The 7th Vim](https://github.com/dofy/7th-vim)._
 
-## 清除搜索高亮
+### Clear search highlight
 
-前面提到的配置中，有一项是高亮全部搜索结果 `:set hlsearch`，其作用是当你执行 `/`
-、`?`、`*` 或 `#` 搜索后高亮所有匹配结果。
+In the configuration mentioned above, there is an option to highlight all search
+results `:set hlsearch`, its function is when you execute `/`, `?`, `*` or `#`
+search and highlight all matching results.
 
-> 如果你已经设置了这个选项，尝试执行 `/set`
+> If you have set this option, try executing `/set`
 
-看到效果了吧，搜索结果一目了然，但这有时候也是一种困扰，因为知道搜索结果后高亮就没用了，但高亮
-本人并不这样认为，它会一直高亮下去，直到你用 `:set nohlsearch` 将其关闭。
+See the effect, the search results are clear at a glance, but this is sometimes
+a kind of trouble, because the highlight does not think so, it will always
+highlight, until you use `:set nohlsearch` to turn it off.
 
-但这样需要就打开，不需要就关闭也不是个办法，有没有更好的解决方案呢？当然！请看下面的终极答案：
+But this requires you to turn it on when you need it, and turn it off when you
+don't need it. Is there a better solution? of course! See the ultimate answer
+below:
 
-> **再搜一个不存在的字符串**
+> **Search for a string that does not exist**
 
-通常我用来清除搜索高亮的命令是 `/lfw`，一是因为 `lfw` 这个组合一般不会出现（不适用于
-本文档...），二是这三个字母的组合按起来比较舒服，手指基本不需要怎么移动（你感受一下）。
+Usually I use the command `/lfw` to clear the search highlight. One is because
+the combination of `lfw` is generally not available (not applicable to this
+document...), and the other is that the combination of these three letters is
+more comfortable to press, and the fingers basically do not need to move (you
+feel it).
 
-## 重复上一次命令
+## Repeat the last command
 
-Vim 有一个特殊的命令 `.`，你可以用它重复执行上一个命令。
+Vim has a special command `.`, you can use it to repeat the last command.
 
-> 按下面的说明进行操作
+> Follow the instructions below to operate
 
 ```
-按 dd 删除本行
-按 . 重复删除操作
-2. 再删除两行
-这行也没了
-p 把刚才删掉的粘回来
-3. 又多出 6 行
+Press dd to delete this line
+Press . to repeat the delete operation
+Press 2. to delete two more lines
+This line is gone
+Press p to paste it back
+Press 3. to add 6 more lines
 ```
 
-## 缩进
+## Indentation
 
-- `>>` 向右缩进当前行
-- `<<` 向左缩进当前行
+- `>>` indent the current line to the right
+- `<<` indent the current line to the left
 
-> 在这一行上依次按 `3>>`，`<<` 和 `<G` 看看效果
+> On this line, press `3>>`, `<<` and `<G` in turn to see the effect
 >
-> 打酱油行
+> Go to the soy sauce line
 
-## 自动排版
+## Automatic typesetting
 
-- `==` 自动排版当前行
-- `gg=G` 当前文档全文自动排版
-- `<N>==` 对从当前行开始的 N 行进行自动排版
-- `=<N>j` 对当前行以及向下 N 行进行自动排版
-- `=<N>k` 对当前行以及向上 N 行进行自动排版
+- `==` automatic typesetting of the current line
+- `gg=G` automatic typesetting of the current document
+- `<N>==` automatic typesetting for N lines starting from the current line
+- `=<N>j` automatic typesetting for the current line and N lines below
+- `=<N>k` automatic typesetting for the current line and N lines above
 
-> 另外，还可以利用[第二章](chapter02.md)中提到的匹配搜索对代码块进行批量排版，尝试用
-> `gf` 命令打开 [chapter04-demo.js](chapter04-demo.js) 按照里面的说明进行操作
+> In addition, you can also use the matching search mentioned in
+> [Chapter 2](chapter02.md) to batch typeset the code block. Try using the `gf`
+> command to open [chapter04-demo.js](chapter04-demo.js) according to the
+> instructions in it.
 
-如果智能缩进设置生效了，执行后会看到如[第二章](chapter02.md)中一样的排版效果。
+If the smart indentation setting takes effect, you will see the same typesetting
+effect as in [Chapter 2](chapter02.md).
 
-[下一章](chapter05.md)将介绍分屏和标签页。
+The [next Chapter](chapter05.md) will introduce split screen and tab page.