anchor.diff:      shape or re-shape HTML layout, typically by adding, removing, or manipulating
       elements and their children.
   
  +    一类可以通过添加、删除或操作元素和其子级，来塑造或重塑HTML布局的指令，
  +    
       The `ngIf` "conditional element" directive and the `ngFor` "repeater" directive are
       good examples in this category.
  +    
  +    `ngIf`"有条件的元素conditional element"指令和 `ngFor` "中继器repeater"指令是很好的结构型指令。
  +    
   // #enddocregion n-s
   
   // #docregion t1
  
positive.code:     A module **exports** something of value in that code, typically one thing such as a class.
      A module that needs that thing, **imports** it.
      
      模块**输出**一些东西，一般都是一个东西：类。
      模块如果需要什么东西，那就**导入**它。
  
      The structure of Angular modules and the import/export syntax
  
negative.code:   :marked
      A [Component](#component) with an attached router.
  
      路由组件是一个附加了路由的[组件Component](#component)。
  
      In most cases, the component became attached to a [router](#router) by means
      of a `#{atSym}RouterConfig` #{decorator} that defined routes to views controlled by this component.
      
      在大部分情况下，通过`#{atSym}RouterConfig` #{decorator}装饰器，这个组件通常会被附加一个[router路由器](#router)，来定义被这个组件控制的多个视图的路径。
  
      The component's template has a `RouterOutlet` element where it can display views produced by the router.
      
      组件的模板有一个`路由出口RouterOutlet`元素，用来显示被路由器提供的视图。
  
      It likely has anchor tags or buttons with `RouterLink` directives that users can click to navigate.
      
      它很大可能还会有一些有`RouterLink`指令的锚标记或按钮，用户可以用来点击导航。
  
  <a id="S"></a>
  .l-main-section
  