anchor.diff:  
   .l-main-section#build-and-run
   h2 Step !{step++}: Build and run the app!
  -h2 步骤!{step++}：构建并运行本应用！
  +h2 步骤6：构建并运行本应用！
   block run-app
     :marked
       Open a terminal window and enter this command:
  
positive.code:   <li if-docs="ts">[Step 3](#ngmodule): Create an Angular Module</li>
    <li if-docs="ts">[步骤3](#ngmodule): 创建一个Angular模块</li>
    - [Step !{step++}](#main): Add <span ngio-ex>main.ts</span>, identifying the root component to Angular
    - [步骤!{step++}](#main): 添加<span ngio-ex>main.ts</span>，用来告诉Angular哪个是根组件
    - [Step !{step++}](#index): Add `index.html`, the web page that hosts the application
    - [步骤!{step++}](#index): 添加`index.html`，本应用的宿主页面
    - [Step !{step++}](#build-and-run): Build and run the app
    - [步骤!{step++}](#build-and-run): 构建并运行本应用
    - [Make some changes to the app](#make-some-changes)
    - [对本应用做一些修改](#make-some-changes)
    - [Wrap up](#wrap-up)
  
negative.code:   .l-main-section#ngmodule
    :marked
      ## Step 3: Our own `app.module.ts`
      ## 步骤3：创建`app.module.ts`
  
      We compose Angular apps into closely related blocks of functionality with [Angular Modules](guide/ngmodule.html).
      Every app requires at least one module, the _root module_, that we call `AppModule` by convention.
  