anchor.diff:      A module **exports** something of value in that code, typically one thing such as a class.
       A module that needs that thing, **imports** it.
       
  -    模块一般 **输出** 一个东西：类。
  -    模块如果需要什么东西，那就 **导入** 它。
  +    模块代码中通常会**导出(export)**一些东西，最典型的就是类。
  +    模块如果需要什么东西，那就**导入(import)**它。
   
       The structure of Angular modules and the import/export syntax
       is based on the [ES2015](#es2015) module standard
       described [here](http://www.2ality.com/2014/09/es6-modules-final.html).
       
  -    Angular的模块结构和输出/导入语法是基于[ES2015](#es2015)模块化标准的，参见[这里](http://www.2ality.com/2014/09/es6-modules-final.html).
  +    Angular的模块结构和输出/导入语法是基于[ES2015](#es2015)模块化标准的，参见[这里](http://www.2ality.com/2014/09/es6-modules-final.html)。
   
       An application that adheres to this standard requires a module loader to
       load modules on request and resolve inter-module dependencies.
  
positive.code:     it creates the matching directive class instance
      and gives that instance control over that portion of the browser DOM.
      
      指令几乎都是关联到HTML元素或属性(Attribute)的。我们通常把这些关联的HTML元素或者属性(Attribute)当做指令本身。
      当Angular在HTML模板中遇到一个指令的时候，它就找出一个与该指令匹配的类，创建此类的实例，然后把浏览器中这部分DOM的控制权交给该实例。
  
      Developers can invent custom HTML markup (e.g., `<my-directive>`) to
      associate with their custom directives. They add this custom markup to HTML templates
  
negative.code:     A Provider creates a new instance of a dependency for the Dependency Injection system.
      It relates a lookup token to code - sometimes called a "recipe" - that can create a dependency value.
      
      依赖注入系统依靠供应商来创建依赖的实例。它把一个供查阅用的令牌和代码（有时也叫“配方”）关联到一起，以便创建依赖值。
      
      For example, `new Provider(Foo, {useClass: Foo})` creates a `Provider`
      that relates the `Foo` token to a function that creates a new instance of the `Foo` class.
      
      比如，`new Provider(Foo, {useClass: Foo})`创建一个`Provider`，把令牌`Foo`联系到一个函数，该函数会创建一个`Foo`类的实例。
  
      There are other ways to create tokens and recipes.
      See [Dependency Injection](#dependency-injection) chapter to learn more.
      
      还有其它一些方法创建令牌和配方。
      参见[依赖注入(Dependency Injection)](#dependency-injection)以获取更多信息。 
  
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