di review
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@ -628,7 +628,7 @@ include ../_util-fns
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As it happens, we could have added it to our first version of `HeroService`.
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We didn't bother because we didn't need it then.
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注意上面这个服务类的 `@Injectable()` #{decorationCn}。但我们以前从没见过`@Injectable()`。
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注意上面这个服务类的 `@Injectable()` #{decorationCn}。我们以前从没见过`@Injectable()`。
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其实我们可以把它加到第一版的`HeroService`上。
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但我们没有那么做,因为那时候还不需要它。
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@ -646,7 +646,7 @@ include ../_util-fns
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- var decorated = lang == 'dart' ? 'annotated' : 'decorated'
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- var decoratedCn = lang == 'dart' ? '注解' : '装饰器'
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- var any_decorator = lang == 'dart' ? '' : 'TypeScript generates metadata for any class with a decorator, and any decorator will do.'
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- var any_decoratorCn = lang == 'dart' ? '' : 'TypeScript会为任何带有装饰器的类生成元数据,而且会为任何装饰器都生成。'
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- var any_decoratorCn = lang == 'dart' ? '' : 'TypeScript会为任何带有装饰器的类生成元数据,任何装饰器都行。'
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.callout.is-helpful
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header Suggestion: add @Injectable() to every service class
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@ -747,9 +747,7 @@ code-example(format, language="html").
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`HeroService`, which it needed to
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create and inject into a new `HeroListComponent`.
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Angular这是在告诉我们,依赖注入器找不到日志服务的*供应商*。
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它需要这个供应商来创建一个`Logger`实例,以便注入到一个`HeroService`的新实例中,
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而`HeroService`的新实例在创建`HeroListComponent`的新实例时需要被创建和注入。
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Angular这是在告诉我们,依赖注入器找不到日志服务的*供应商*。在创建`HeroListComponent`的新实例时需要创建和注入`HeroService`,然后`HeroService`需要创建和注入一个`Logger`实例,Angular需要这个供应商来创建一个`Logger`实例。
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The chain of creations started with the `Logger` provider. The *provider* is the subject of our next section.
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