anchor.diff:  
       **Create #{_an} #{_appDir} subfolder** off the project root directory:
       
  -    **在应用的根目录下创建一个#{_appDir}子目录：
  +    **在应用的根目录下创建#{_appDir}子目录：
   
     code-example.code-shell.
       mkdir #{_appDir}
  
positive.code:     * **An import statement**. Importing gives your component access to
      Angular's core [`@Component` decorator function](../latest/api/core/index/Component-decorator
      .html).
      * **一个import语句**。它让你能访问Angular核心库中的[`@Component`装饰器函数](../latest/api/core/index/Component-decorator.html)。
  
      * **A @Component #{_decorator}** that associates *metadata* with the
          `AppComponent` component class:
  
      * **一个@Component#{_decoratorCn}**，它会把一份*元数据*关联到`AppComponent`组件类上：
  
          - a *selector* that specifies a simple CSS selector for an HTML element that represents
            the component.
  
          - *selector*为用来代表该组件的HTML元素指定一个简单的CSS选择器。
  
          - a *template* that tells Angular how to render the component's view.
  
  
negative.code:   Create a `styles.css` file in the *#{_indexHtmlDir}* folder, and start styling,
    perhaps with the minimal styles shown below.
    
    在*#{_indexHtmlDir}*目录下创建`styles.css`文件，并且用下面列出的最小化样式作为初始样式。
  
  +makeExcerpt('styles.css (excerpt)', 'quickstart')
  
  