anchor.diff:    :marked
       The [Routing and Navigation](../guide/router.html) chapter covers the router in more detail
       than we will in this tutorial.
  +
  +    [路由和导航](../guide/router.html)章节介绍了更多关于路由的细节。
   
   :marked
     Run the <live-example></live-example> for this part.
  
positive.code: :marked
    Notice how we extract the `id` by calling the `subscribe` method
    which will deliver our array of route parameters.
  +makeExample('toh-5/ts/app/hero-detail.component.ts', 'get-id')(format=".")
  
  :marked
  
negative.code: 
    * call the service to get heroes inside the Angular `ngOnInit` lifecycle hook.
  
    * 在Angular的`ngOnInit`生命周期钩子里面调用服务来获得英雄列表。
  
    The noteworthy differences: we cherry-pick four heroes (2nd, 3rd, 4th, and 5th) with *slice*
    and stub the `gotoDetail` method until we're ready to implement it.
  
    值得注意的区别是：我们用*slice*随机提取了四个英雄（第2、3、4、5个），暂时隔离`gotoDetail`方法直到时机成熟。
  
    Refresh the browser and see four heroes in the new dashboard.
  
  