anchor.diff:      ### 有用的脚本
       We've included a number of npm scripts in our suggested `package.json` to handle common development tasks:
       我们在建议的`package.json`中包括了几个npm脚本来处理常见的开发任务：
  -  +makeJson('quickstart/ts/package.1.json',{ paths: 'scripts'}, 'package.json (scripts)')(format=".")
  +  +makeJson('quickstart/ts/package.1.json',{paths: 'scripts'}, 'package.json (脚本)')(format=".")
   
     :marked
       We execute most npm scripts in the following way: `npm run` + *script-name*. 
  
positive.code: .l-main-section
  :marked
    ## Wrap Up
    Our first application doesn't do much. It's basically "Hello, World" for Angular 2.
  
    We kept it simple in our first pass: we wrote a little Angular component,
    we added some JavaScript libraries to `index.html`, and launched with a
    static file server. That's about all we'd expect to do for a "Hello, World" app.
  
    **We have greater ambitions.**
  
    The good news is that the overhead of setup is (mostly) behind us. 
    We'll probably only touch the `package.json` to update libraries.
    We'll likely open `index.html` only if we need to add a library or some css stylesheets.
  
    We're about to take the next step and build a small application that 
    demonstrates the great things we can build with Angular 2.
  
    Join us on the [Tour of Heroes Tutorial](./tutorial)!
  
negative.code:     metadata, finds the `my-app` selector, locates an element tag named `my-app`,
      and loads our application between those tags.
  
      当Angular在`main.ts`中调用`bootstrap`函数时，它读取`AppComponent`的元数据（metadata），发现选择器是`my-app`，于是它定位到一个元素名是`my-app`的DOM元素，并且把我们的应用加载到这个标记中。
  .l-main-section
  :marked
    ## Add some style
    ## 添加一些样式
    Styles aren't essential but they're nice and the `index.html` assumes we have
    a stylesheet called `styles.css`.
  
    样式不是必备的，但是它让我们的应用更漂亮。`index.html`假设我们有一个名叫`styles.css`的样式表。
  
    Create a `styles.css` in the root folder and start styling, perhaps with this set:
    
    在根目录下创建一个`styles.css`文件来加上样式，这个文件也许是这样的：
  
  +makeExample('quickstart/ts/styles.1.css', null, 'styles.css (摘录)')(format=".")
  
  .l-main-section
  :marked
    ## Compile and run!
    ## 编译和运行
    
    Open a terminal window and enter this command:
    打开terminal（终端）窗口，并且敲如下命令：
  code-example(format="").
    npm start
  :marked
  