removed provider translation.
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Zhimin(Rex) YE
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@ -12,7 +12,7 @@ include ../_util-fns
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[Application-wide dependencies](#app-wide-dependencies)
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[应用程序全范围依赖](#app-wide-dependencies)
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[应用程序全局依赖](#app-wide-dependencies)
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[External module configuration](#external-module-configuration)
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@ -39,11 +39,11 @@ include ../_util-fns
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[Define dependencies with providers](#providers)
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[使用提供者（providers）定义依赖](#providers)
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[使用Provider定义依赖](#providers)
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* [The *provide* function](#provide)
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* [*提供者provide*功能](#provide)
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* [*provide*功能](#provide)
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* [useValue - the *value provider*](#usevalue)
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* [useClass - the *class provider*](#useclass)
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@ -70,28 +70,35 @@ include ../_util-fns
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:marked
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**See the [live example](/resources/live-examples/cb-dependency-injection/ts/plnkr.html)**
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of the code supporting this cookbook.
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获取本“食谱”的代码支持，**请看[在线例子](/resources/live-examples/cb-dependency-injection/ts/plnkr.html)**。
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.l-main-section
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<a id="app-wide-dependencies"></a>
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:marked
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## Application-wide dependencies
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## 应用程序全局依赖
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Register providers for dependencies used throughout the application in the root application component, `AppComponent`.
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在应用程序根组件`AppComponent`注册那些被应用程序全局使用的依赖providers。
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In the following example, we import and register several services
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(the `LoggerService`, `UserContext`, and the `UserService`)
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in the `@Component` metadata `providers` array.
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在下面的例子中，我们在`@Component`元数据的`providers`数组中，导入和注册了几个服务（`LoggerService`, `UserContext`和`UserService`)。
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+makeExample('cb-dependency-injection/ts/app/app.component.ts','import-services','app/app.component.ts (excerpt)')(format='.')
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:marked
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All of these services are implemented as classes.
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Service classes can act as their own providers which is why listing them in the `providers` array
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is all the registration we need.
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所有上面这些服务都是用类来实现的。服务类能充当它们自己的Providers，这就是为什么把它们列到一个`providers`数组里是唯一的注册要求。
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.l-sub-section
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:marked
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A *provider* is something that can create or deliver a service.
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Angular creates a service instance from a class provider by "new-ing" it.
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Learn more about providers [below](#providers).
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一个*provider*
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:marked
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Now that we've registered these services,
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Angular can inject them into the constructor of *any* component or service, *anywhere* in the application.
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@ -101,7 +101,7 @@ include _util-fns
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between a "token" or "key" and a dependency [provider](#provider).
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This more rare usage should be clear in context.
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有可能指的是[依赖注入](#dependency-injection)在一个记号(Token)或键值(Key)和一个依赖[提供者](#provider)之间的绑定。
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有可能指的是[依赖注入](#dependency-injection)在一个记号(Token)或键值(Key)和一个依赖[Provider](#provider)之间的绑定。
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这个用法很少，而且一般都应该在上下文中明确标示。
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:marked
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@ -115,7 +115,7 @@ include _util-fns
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[dependency injection system](#dependency-injection).
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我们通过一个名叫`bootstrap`的类方法来引导装入Angular应用程序。这个`bootstrap`类方法会识别应用程序的顶级“根”[组件](#component)，
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并可能通过[依赖注入系统](#dependency-injection)注册服务[提供者](#provider)。
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并可能通过[依赖注入系统](#dependency-injection)注册服务[Provider](#provider)。
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One can bootstrap multiple apps in the same `index.html`, each with its own top level root.
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你可以在同一个`index.html`启动多个程序，每个程序都有自己的顶级根组件。
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@ -390,26 +390,26 @@ include _util-fns
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If the `Injector` can't find a value for a given token, it creates
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a new value using a `Provider` for that token.
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`注入器`维护一个令牌与其对应的依赖值对照图。如果`注入器`不能找到一个令牌对应的依赖值，它就会使用`提供者(Provider)`新建一个依赖值。
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`注入器`维护一个令牌与其对应的依赖值对照图。如果`注入器`不能找到一个令牌对应的依赖值，它就会使用`Provider`新建一个依赖值。
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A [Provider](#provider) is a recipe for
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creating new instances of a dependency value associated with a particular token.
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一个`提供者(Provider)`(#provider)是一个使用指定令牌来新建其对应的依赖实例的方法。
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一个`Provider`(#provider)是一个使用指定令牌来新建其对应的依赖实例的方法。
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An injector can only create a value for a given token if it has
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a `Provider` for that token in its internal provider registry.
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Registering providers is a critical preparatory step.
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如果在注入器的内部注册表里面，一个令牌对应的依赖值是一个`提供者`，那么注入器只能为令牌创建一个依赖值。注册提供者是一个非常关键的准备步骤。
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如果在注入器的内部注册表里面，一个令牌对应的依赖值是一个`Provider`，那么注入器只能为令牌创建一个依赖值。注册Provider是一个非常关键的准备步骤。
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Angular registers some of its own providers with every injector.
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We can register our own providers. Quite often the best time to register a `Provider`
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is when we [bootstrap](#bootstrap) the application.
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There are other opportunities to register as well.
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Angular为每个注册器注册很多自己的提供者。我们可以注册一些自己的提供者。一般最好的注册提供者的时间是在应用程序的[引导程序Bootstrap](#bootstrap)的时候。
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我们也有其他很多机会注册提供者。
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Angular为每个注册器注册很多自己的Provider。我们可以注册一些自己的Provider。一般最好的注册Provider的时间是在应用程序的[引导程序Bootstrap](#bootstrap)的时候。
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我们也有其他很多机会注册Provider。
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Learn more in the [Dependency Injection](guide/dependency-injection.html) chapter.
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@ -543,7 +543,7 @@ include _util-fns
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that can find a named "dependency" in its cache or create such a thing
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with a registered [provider](#provider).
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一个Angular[依赖注入系统](#dependency-injection)内部的对象，它可以在自己的内部缓存找到已点名的依赖或者利用一个注册过的[提供者provider](#provider)新建一个依赖。
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一个Angular[依赖注入系统](#dependency-injection)内部的对象，它可以在自己的内部缓存找到已点名的依赖或者利用一个注册过的[provider](#provider)新建一个依赖。
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:marked
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## Input
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.l-sub-section
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@ -783,18 +783,18 @@ include _util-fns
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:marked
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## Provider
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## 提供者
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## Provider
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.l-sub-section
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:marked
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A Provider creates a new instance of a dependency for the Dependency Injection system.
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It relates a lookup token to code - sometimes called a "recipe" - that can create a dependency value.
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提供者为依赖注入系统新建一个依赖的实例。它是关于通过令牌查询代码，有时被叫做“方剂”，可以创建依赖值。
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Provider为依赖注入系统新建一个依赖的实例。它是关于通过令牌查询代码，有时被叫做“方剂”，可以创建依赖值。
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For example, `new Provider(Foo, {useClass: Foo})` creates a `Provider`
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that relates the `Foo` token to a function that creates a new instance of the `Foo` class.
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比如，`new Provider(Foo, {useClass: Foo})`新建一个`提供者`，把`Foo`令牌联系到一个函数，这个函数新建一个`Foo`类的实例。
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比如，`new Provider(Foo, {useClass: Foo})`新建一个`Provider`，把`Foo`令牌联系到一个函数，这个函数新建一个`Foo`类的实例。
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There are other ways to create tokens and recipes.
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See [Dependency Injection](#dependency-injection) chapter to learn more.
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