translation - lifecycle hooks.
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// #docregion e2
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.l-main-section
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:marked
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## ECMAScript
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## ECMAScript
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The [official JavaScript language specification](https://en.wikipedia.org/wiki/ECMAScript).
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[官方Javascript语言规范](https://en.wikipedia.org/wiki/ECMAScript)
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The latest approved version of JavaScript is
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[ECMAScript 2015](http://www.ecma-international.org/ecma-262/6.0/)
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(AKA "ES2015" or "ES6") and many Angular 2 developers will write their applications
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either in this version of the language or a dialect that strives to be
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compatible with it such as [TypeScript](#typesScript).
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最新的被认可的Javascript版本是[ECMAScript 2015](http://www.ecma-international.org/ecma-262/6.0/)，（也交“ES2015”或“ES6”）。Angular 2的开发者要么这个版本的Javascript，要么使用与这个版本兼容的语言，比如[TypeScript](#typesScript)。
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Most modern browsers today only support the prior "ECMAScript 5" (AKA ES5) standard.
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Applications written in ES2015 or one of its dialects must be "[transpiled](#transpile)"
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to ES5 JavaScript.
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目前，几乎所有现代游览器都只支持上一版本“ECMAScript 5” （也就是ES5）标准。使用ES2015或者其他兼容语言开发的应用程序，都必须被编译“[transpiled](#transpile)”成ES5 Javascript。
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Angular 2 developers may choose to write in ES5 directly.
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Angular 2的开发者也可以选择直接使用ES5编程。
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:marked
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## ECMAScript 2015
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## ECMAScript 2015
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The lastest released version of JavaScript,
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[ECMAScript 2015](http://www.ecma-international.org/ecma-262/6.0/)
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(AKA "ES2015" or "ES6")
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最新发布的Javascript版本，[ECMAScript 2015](http://www.ecma-international.org/ecma-262/6.0/)
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(即 "ES2015" 或 "ES6")
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:marked
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## ES2015
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Short hand for "[ECMAScript 2015](#ecmascript=2015)".
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“[ECMAScript 2015](#ecmascript=2015)”的简写。
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## ES6
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Short hand for "[ECMAScript 2015](#ecmascript=2015)".
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[ECMAScript 2015](#ecmascript=2015)的简写。
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:marked
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## ES5
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.l-sub-section
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:marked
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Short hand for "ECMAScript 5", the version of JavaScript run by most modern browsers.
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See [ECMAScript](#ecmascript).
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“ECMAScript 5”的简写，大部分现代浏览器使用的Javascript版本。请看[ECMAScript](#ecmascript)。
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// #enddocregion e2
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// #docregion f-l
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@ -518,12 +536,14 @@ include _util-fns
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.l-main-section
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:marked
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## Injector
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## 注入器
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.l-sub-section
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An object in the Angular [dependency injection system](#dependency-injection)
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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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:marked
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## Input
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.l-sub-section
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[Property Binding](guide/template-syntax.html#property-binding).
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Data values flow *into* this property from the data source identified
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in the template expression to the right of the equal sign.
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一个指令属性：是[属性绑定Property Binding](guide/template-syntax.html#property-binding)的目标。数据值从处于模板表达式等号右边的数据源中，流入这个指令属性。
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See the [Template Syntax](guide/template-syntax.html#inputs-outputs) chapter.
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请看[模板语法Template Syntax](guide/template-syntax.html#inputs-outputs)章节。
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:marked
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## Interpolation
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## 插值表达式
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.l-sub-section
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:marked
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A form of [Property Data Binding](#data-binding) in which a
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@ -544,6 +569,8 @@ include _util-fns
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renders as text. That text may be concatenated with neighboring text
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before it is assigned to an element property
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or displayed between element tags as in this example.
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一种[属性数据绑定Property Data Binding](#data-binding) 的方式：在双大括号中间的[模板表达式](#template-expression)被渲染成文本。在被指派给元素属性或者在元素标记中间显示之前，这些文本可能与傍边的文本先合并，请看下面的例子。
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code-example(language="html" escape="html").
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<label>My current hero is {{hero.name}}</label>
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@ -551,7 +578,8 @@ include _util-fns
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:marked
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Learn more about interpolation in the
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[Template Syntax](guide/template-syntax.html#interpolation) chapter.
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从[模板语法Template Syntax](guide/template-syntax.html#interpolation)章节学习更多关于插值表达式的知识。
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<a id="J"></a>
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@ -559,22 +587,32 @@ include _util-fns
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<a id="K"></a>
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:marked
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## kebab-case
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## 可芭比命名法
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:marked
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The practice of writing compound words or phrases such that each word is separated by a dash or hyphen (-).
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使用横杠来分割每个单词的编写复合词或短语的命名方法。
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Directive selectors and the root of filenames are often spelled in kebab-case. Examples include: `my-app` and the `hero-list.component.ts`.
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指令选择器和文件名字等一般都用可芭比命名法Kebab-case。比如`my-app`和`hero-list.component.ts`。
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This form is also known as [dash-case](#dash-case).
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这种命名法也被叫做[横杠命名法dash-case](#dash-case)
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<a id="L"></a>
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.l-main-section
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:marked
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## Lifecycle Hooks
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## 生命周期钩子
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.l-sub-section
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[Directives](#directive) and [Components](#component) have a lifecycle
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managed by Angular as it creates, updates and destroys them.
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[指令Directives](#directive)和[组件Components](#component)有生命周期，由Angular在新建、更新和销毁的过程中管理。
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Developers can tap into key moments in that lifecycle by implementing
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one or more of the "Lifecycle Hook" interfaces.
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