anchor.diff:      :marked
         Don't forget the asterisk (`*`) in front of `ngIf`.
         
  -      记住，`ngIf`前导星号 (`*`) 是语法中的重要组成部分。
  +      别忘了`ngIf`前的星号 (`*`)。
   
     :marked
       The app no longer fails and the list of names displays again in the browser.
  
positive.code:     :marked
        Read more about the `[class]` binding in the [Template Syntax](../guide/template-syntax.html#ngClass "Template syntax: NgClass") guide.
  
        关于属性绑定的更多信息，见[模板语法](../guide/template-syntax.html#property-binding)。
  
    :marked
      The final version of the `<li>` looks like this:
    +makeExample('toh-2/ts/src/app/app.component.1.html', 'class-selected-2', 'app.component.ts (styling each hero)')(format=".")
  
    :marked
  
negative.code: :marked
    ## Keep the app transpiling and running
    
    ## 让应用代码保持转译和运行
    
    Enter the following command in the terminal window:
  
  