anchor.diff:          In Angular&nbsp;2, the template no longer specifies its associated controller.
           Rather, the component specifies its associated template as part of the component class decorator.
   
  -        在Angular 2中，模板不用再指定它相关的视图。
  +        在Angular 2中，模板不用再指定它相关的控制器。
           反过来，组件会在组件类的装饰器中指定与它相关的模板。
   
           For more information see [Architecture Overview](../guide/architecture.html#component).
  
positive.code:         The `*ngIf` directive in Angular&nbsp;2 works the same as the `ng-if` directive in Angular&nbsp;1,
          it removes or recreates a portion of the DOM based on an expression.
  
          Angular 2中的`*ngIf`指令与Angular 1中的`ng-if`指令不同，
          它根据表达式的值移除或重建DOM中的一部分。
  
          In this example, the `table` element is removed from the DOM unless the `movies` array has a length.
  
negative.code: 
          For a list of DOM events, see: https://developer.mozilla.org/en-US/docs/Web/Events.
  
          要查看DOM事件的列表，请参见[网络事件](https://developer.mozilla.org/en-US/docs/Web/Events)。
  
          For more information see [Template Syntax](../guide/template-syntax.html#event-binding).
  
  