anchor.diff:  - var _vers = _docsFor == 'dart' ? '' : '.1'
   +makeExcerpt('app/app.component' + _vers + '.ts', 'template-v3')
   
  -+makeExample('toh-5/ts/app/app.component.3.ts','template', 'app/app.component.ts (template)')(format=".")
   .l-sub-section
     :marked
       We nestled the two links within `<nav>` tags.
  
positive.code:     :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。
  
  :marked
    #### Add navigation to the template
  
negative.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。
  
  