anchor.diff:    most of them exported. 
     
     为那些可能会在应用中到处使用的组件、指令和管道创建`SharedModule`。
  -  大多数这种模块都应该只导出`declarations`。
  +  这种模块应该只包含`declarations`，并且应该导出几乎所有`declarations`里面的声明。
     
     It may re-export other [widget modules](#widget-feature-module) such as `CommonModule`,
     `FormsModule` and modules with the UI controls that you use most widely.
  
positive.code:       :marked
          A list of components that are _not_ [referenced](#q-template-reference) in a reachable component template.
          
          那些*没有*在任何可抵达组件的模板中[引用过](#q-template-reference)的组件列表。
  
          Most developers will never set this property. Here's why.
          
  
negative.code: a#q-module-recommendations
  .l-main-section
  :marked
    ### What kinds of modules should I have and how should I use them?
    
    ### 有哪些类型的模块？我应该如何使用它们？
  
    Every app is different and developers have varying levels of experience and comfort with the available choices.
    Some suggestions and guidelines appear to have wide appeal.
  
    每个应用都不一样。根据不同程度的经验，开发者会做出不同的选择。一些建议和向导具有更加广泛的吸引力。
  
  .alert.is-important
    :marked
  