anchor.diff:  
     1. Import the `router` from the Angular router library
   
  -  1. 从Angular路由器库导入`router`
  +     从 Angular 路由器库导入`router`
   
     1. Inject the `router` in the constructor (along with the `HeroService`)
   
  -  1. 在构造函数中注入`router`（与`HeroService`一起）
  +     在构造函数中注入`router`（与`HeroService`一起）
   
     1. Implement `gotoDetail` by calling the `router.navigate` method
   
  -  1. 实现`gotoDetail`，调用`router.navigate`方法
  +     实现`gotoDetail`，调用`router.navigate`方法
   
   +makeExcerpt('app/heroes.component.ts', 'gotoDetail')
   
  
positive.code: 
    * Turn `AppComponent` into an application shell that only handles navigation
  
    * 把`AppComponent`变成应用程序的“壳”，它只处理导航，
  
    * Relocate the *Heroes* concerns within the current `AppComponent` to a separate `HeroesComponent`
  
    * 把现在由`AppComponent`关注的*英雄们*移到一个独立的`HeroesComponent`中，
  
    * Add routing
  
    * 添加路由
  
    * Create a new `DashboardComponent`
  
    * 创建一个新的`DashboardComponent`组件
  
    * Tie the *Dashboard* into the navigation structure
  
    * 把*仪表盘*加入导航结构中。
  
  .l-sub-section
    :marked
  
negative.code: 
    * Add a *Dashboard* view.
  
      添加一个*仪表盘*视图。
  
    * Navigate between the *Heroes* and *Dashboard* views.
  
      在*英雄列表*和*仪表盘*视图之间导航。
  
    * Clicking on a hero in either view navigates to a detail view of the selected hero.
  
      无论在哪个视图中点击一个英雄，都会导航到该英雄的详情页。
  
    * Clicking a *deep link* in an email opens the detail view for a particular hero.
  
      在邮件中点击一个*深链接*，会直接打开一个特定英雄的详情视图。
  
    When we’re done, users will be able to navigate the app like this:
  
    完成时，用户就能像这样在应用中导航：
  
  figure.image-display
    img(src='/resources/images/devguide/toh/nav-diagram.png' alt="查看导航")
  