anchor.diff:  
     This is a big improvement in modularity compared to how CSS traditionally works.
     
  +  这种模块化相对于 CSS 的传统工作方式是一个巨大的改进。
  +  
     * You can use the CSS class names and selectors that make the most sense in the context of each component. 
     
       可以使用对每个组件最有意义的 CSS 类名和选择器。
  
positive.code:     If you use module bundlers like Webpack, you can also use the `styles` attribute
      to load styles from external files at build time. You could write:
  
      像 Webpack 这类模块打包器的用户可能会使用`styles`属性来在构建时从外部文件中加载样式。它们可能这样写：`styles: [require('my.component.css')]`
  
      Set the `styles` property, notthe `styleUrls` property. The module 
      bundler loads the CSS strings, not Angular. 
  
negative.code:   在本章中，我们将学到如何加载和使用这些*组件样式*。
  
    ## Table Of Contents
    
    # 目录
  
    * [Using component styles](#using-component-styles)
  
      [使用组件样式](#using-component-styles)
      
    * [Special selectors](#special-selectors)
  
      [特殊的选择器](#special-selectors)
  