来自网友张旋和Z的修改意见
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Zhicheng Wang
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@ -17,5 +17,4 @@ md-toolbar(class="main-nav background-regal l-pinned-top l-layer-5",scroll-y-off
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li.l-right <a class="main-nav-button" href="/docs/ts/latest/quickstart.html" md-button>立即开始！</a>
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li.l-right <a class="main-nav-button" href="/docs/ts/latest/quickstart.html" md-button>立即开始！</a>
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li.l-right
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li.l-right
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a.main-nav-button.md-button(ng-click="appCtrl.toggleSource($event)", href)
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a.main-nav-button.md-button(ng-click="appCtrl.toggleSource($event)", href)
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span(ng-if="!appCtrl.sourceVisible") 显示原文
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span {{appCtrl.sourceVisible?'隐藏原文':'显示原文'}}
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span(ng-if="appCtrl.sourceVisible") 隐藏原文
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@ -23,7 +23,7 @@ block includes
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- [Angular dependency injection](#angular-dependency-injection)
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- [Angular dependency injection](#angular-dependency-injection)
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- [Angular依赖注入](#angular-dependency-injection)
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- [Angular依赖注入](#angular-dependency-injection)
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- [Injector providers](#injector-providers)
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- [Injector providers](#injector-providers)
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- [注入器提供商](#injector-providers)
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- [注入器供应商](#injector-providers)
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- [Dependency injection tokens](#dependency-injection-tokens)
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- [Dependency injection tokens](#dependency-injection-tokens)
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- [依赖注入令牌](#dependency-injection-tokens)
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- [依赖注入令牌](#dependency-injection-tokens)
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- [Summary](#summary)
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- [Summary](#summary)
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@ -139,7 +139,7 @@ code-example(language="bash").
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当TypeScript看到`@Injectable()`装饰器时，就会记下本服务的元数据。如果Angular需要往这个服务中注入其它依赖，就会使用这些元数据。
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当TypeScript看到`@Injectable()`装饰器时，就会记下本服务的元数据。如果Angular需要往这个服务中注入其它依赖，就会使用这些元数据。
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The `HeroService` doesn't have any dependencies *at the moment*. Add the decorator anyway.
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The `HeroService` doesn't have any dependencies *at the moment*. Add the decorator anyway.
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It is a "best practice" to apply the `@Injectable()` decorator *from the start*
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It is a "best practice" to apply the `@Injectable()` decorator *from the start*
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both for consistency and for future-proofing.
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both for consistency and for future-proofing.
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此刻，`HeroService`还没有任何依赖，但我们还是得加上这个装饰器。作为一项最佳实践，无论是出于提高统一性还是减少变更的目的，都应该从一开始就加上`@Injectable()`装饰器。
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此刻，`HeroService`还没有任何依赖，但我们还是得加上这个装饰器。作为一项最佳实践，无论是出于提高统一性还是减少变更的目的，都应该从一开始就加上`@Injectable()`装饰器。
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@ -320,6 +320,9 @@ code-example(format="." language="html").
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:marked
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:marked
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The `providers` array tells Angular to create a fresh instance of the `HeroService` when it creates a new `AppComponent`.
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The `providers` array tells Angular to create a fresh instance of the `HeroService` when it creates a new `AppComponent`.
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The `AppComponent` can use that service to get heroes and so can every child component of its component tree.
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The `AppComponent` can use that service to get heroes and so can every child component of its component tree.
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`providers`数组告诉Angular，当它创建新的`AppComponent`组件时，也要创建一个`HeroService`的新实例。
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`AppComponent`会使用那个服务来获取影响列表，在它组件树中的每一个子组件也同样如此。
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a#child-component
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a#child-component
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:marked
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:marked
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### *getHeroes* in the *AppComponent*
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### *getHeroes* in the *AppComponent*
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@ -49,5 +49,7 @@
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在翻译和校对过程中，我们得到了很多人的帮助，在此一并致谢，他/她们是：
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在翻译和校对过程中，我们得到了很多人的帮助，在此一并致谢，他/她们是：
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- Joeylin
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- Joeylin
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- 张旋
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- 还有一些做好事不留名的雷锋
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想让你的名字也出现在这里吗？请提供[反馈、纠错](https://github.com/angular/angular-cn/issues)。
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想让你的名字也出现在这里吗？请提供[反馈、纠错](https://github.com/angular/angular-cn/issues)。
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