anchor.diff:    > [**Lifecycle hooks**](lifecycle-hooks.html): We can tap into key moments in the lifetime of a component, from its creation to its destruction, 
     by implementing the lifecycle hook interfaces.
     
  -  > [**生命周期钩子Lifecycle Hooks**](lifecycle-hooks.html)：通过实现生命周期钩子接口，可以切入组件生命中的几个关键点：从创建到销毁。
  +  > [**生命周期钩子**](lifecycle-hooks.html)：通过实现生命周期钩子接口，可以切入组件生命中的几个关键点：从创建到销毁。
     
     > [**Pipes**](pipes.html): Services that transform values for display.
     We can put pipes in our templates to improve the user experience. Consider
     this `currency` pipe expression,
     
  -  > [**管道Pipes**](pipes.html)：这种服务会转换值以供显示。可以把管道放在模板中，以增强用户体验。比如这个`currency`管道表达式，
  +  > [**管道**](pipes.html)：这种服务会转换值以供显示。可以把管道放在模板中，以增强用户体验。比如这个`currency`管道表达式，
     
   <div style="margin-left:40px">
   code-example().
  
positive.code:   `@angular/core`库是主要的Angular模块库，从这里能获得大部分需要的东西。
    
    <br clear="all">
    
    There are other important Angular libraries too, such as `!{_at_angular}/common`, `!{_at_angular}/router`, and `!{_at_angular}/animate`.
    We import what we need from an Angular !{_library_module}.
    
  
negative.code:   [testing library](https://pub.dartlang.org/packages/angular2_testing)
    to run unit tests on our application parts as they interact with the Angular framework.
    
    > [**测试**](testing.html)：Angular提供了一个[测试库](https://pub.dartlang.org/packages/angular2_testing)，
    在程序各个部分与Angular框架交互同时，用来“单元测试”它们。
  