anchor.diff:    The app will `import` dozens if not hundreds of JavaScript and TypeScript files.
     You could write `import` statements with explicit extensions like this example:
     
  -  如果你的应用程序只须`import`几十个JavaScript或TypeScript文件，而不是几百个这么多，你可以在`import`语句里完整写上扩展名，如：
  +  如果你的应用程序只须`import`几十个JavaScript或TypeScript文件，而不是几百个，你可以在`import`语句里完整写上扩展名，如：
   
   .code-example
     code-example(language="typescript").
  
positive.code:   
    * `polyfills`&mdash;the polyfills needed to run Angular applications in most modern browsers.
  
      `polyfills` - 使得Angular应用能够运行在大多数的现代浏览器；
  
    * `vendor`&mdash;the third-party dependencies such as Angular, lodash, and bootstrap.css.
  
      `vendor` - 第三方依赖，如Angular、lodash和bootstrap.css；
  
    * `app`&mdash;the application code.
  
  
negative.code:   #### _module.rules_
    
    Rules tell Webpack which loaders to use for each file, or module:
  
    Rules用来告诉Webpack加载不同文件或模块时该用哪个加载器。
    
  +makeExample('webpack/ts/config/webpack.common.js', 'loaders', 'config/webpack.common.js')(format=".")
  
  :marked
  