anchor.diff:    例如，象下面这样，从`@angular/core`库中导入`Component`装饰器：
     
   +makeExample('src/app/app.component.ts', 'import', '')(format='.')
  +
   :marked
     You also import Angular _modules_ from Angular _libraries_ using JavaScript import statements:
     
     还可以使用 JavaScript 的导入语句从 Angular _库_中导入 Angular _模块_。
     
   +makeExample('src/app/mini-app.ts', 'import-browser-module', '')(format='.')
  +
   :marked
     In the example of the simple root module above, the application module needs material from within that `BrowserModule`. To access that material, add it to the `@NgModule` metadata `imports` like this.
     
  
positive.code: :marked
    You can register providers in modules or in components.
    
    我们可以在模块中或组件中注册提供商。In general, add providers to the [root module](#module) so that
    the same instance of a service is available everywhere.但通常会把提供商添加到[根模块](#module)上，以便在任何地方都使用服务的同一个实例。
  
  +makeExcerpt('src/app/app.module.ts (module providers)', 'providers')
  
  
negative.code: 
    :marked
      > [**Testing**](testing.html): Run unit tests on your application parts as they interact with the Angular framework
      using the _Angular Testing Platform_.
      
      > [**测试**](testing.html)：使用 _Angular 测试平台_，在你的应用部件与 Angular 框架交互时进行单元测试。
  