anchor.diff:      :marked
         Learn about the *redirects* in the [Routing](../guide/router.html#!#redirect) chapter.
   
  -    要学习关于*重定向*的更多知识，参见[路由与导航](../guide/router.html#!#redirect)一章。
  +      要学习关于*重定向*的更多知识，参见[路由与导航](../guide/router.html#!#redirect)一章。
   
   :marked
     #### Add navigation to the template
  
positive.code: 
    1. 把`router`注入到构造函数中(就像`HeroService`那样)
  
    1. Implement the `gotoDetail` method by calling the `router.navigate` method
  
    with a two-part hero-detail link parameters !{_array}.
  
    1. 实现`gotoDetail`方法：以`HeroDetail`和*链接参数数组*为参数调用`router.navigate`方法。
  
  
negative.code: - var _vers = _docsFor == 'dart' ? '' : '.1'
  +makeExcerpt('app/app.component' + _vers + '.ts', 'template-v3')
  
  .l-sub-section
    :marked
      We nestled the two links within `<nav>` tags.
  