anchor.diff:  .l-sub-section
     :marked
       More precisely, the redisplay occurs after some kind of asynchronous event related to
  -    the view, such as a keystroke, a timer completion, or a response to an HTTP request.
  +    the view, such as a keystroke, a timer completion, or a response to an HTTP request.    
   
       严格来说，“重新显示”是在某些与视图有关的异步事件之后发生的，比如：按键、定时器完成或对HTTP请求的响应。
   
  
positive.code: 
  :marked
    Then modify the <ngio-ex path="app.component.ts"></ngio-ex> file by
    changing the template and the body of the component.
  
    然后，到`app.component.ts`文件中修改组件的模板和代码。
  
  
negative.code: .alert.is-important
    :marked
      Don't forget the leading asterisk (\*) in `*ngFor`. It is an essential part of the syntax.
      For more information, see the [Template Syntax](./template-syntax.html#ngFor) page.    
  
      不要忘记`*ngFor`中的前导星号（\*）。它是语法中不可或缺的一部分。
      要了解关于此语法和`ngFor`的更多知识，请参见[模板语法](./template-syntax.html#ngFor)一章。
  