fix: "覆盖" -> "涵盖"

aio/content/guide/change-log.md

@@ -49,7 +49,7 @@ Revised samples are more clear and cover all topics discussed.
 
 对[模板语法](guide/template-syntax) 和 [结构型指令](guide/structural-directives)这两篇指南做了大幅修改，来让它们更加清晰、准确，并符合当前的最佳实践。
 讨论了`<ng-container>`。
-修改了例子，来让它们更清晰，并且覆盖了所有讨论到的主题。
+修改了例子，来让它们更清晰，并且涵盖了所有讨论到的主题。
 
 ## NEW: Samples re-structured with `src/` folder (2017-02-02)
 
@@ -132,7 +132,7 @@ It includes important advice on optimizing for production.
 Closes issue #3086.
 Revised samples are clearer and cover all topics discussed
 
-[多级依赖注入](guide/hierarchical-dependency-injection)做了显著修改。关闭了issue #3086。修改过的范例更加清晰，而且覆盖了讨论到的全部主题。
+[多级依赖注入](guide/hierarchical-dependency-injection)做了显著修改。关闭了issue #3086。修改过的范例更加清晰，而且涵盖了讨论到的全部主题。
 
 ## Miscellaneous (2017-01-05)
 
@@ -236,7 +236,7 @@ released in v.2.2.0, which is the recommended
 facility for migrating from AngularJS to Angular.
 The documentation for the version prior to v.2.2.0 has been removed.
 
-更新的[NgUpgrade指南](guide/upgrade)覆盖在v.2.2.0发布的AoT`upgrade/static`模块，
+更新的[NgUpgrade指南](guide/upgrade)涵盖在v.2.2.0发布的AoT`upgrade/static`模块，
 是从AngularJS升级至Angular的推荐工具。
 删除早于v.2.2.0版本的文档。
 

aio/content/guide/router.md

@@ -10,7 +10,7 @@ as users perform application tasks.
 This guide covers the router's primary features, illustrating them through the evolution
 of a small application that you can <live-example>run live in the browser</live-example>.
 
-本章覆盖了该路由器的主要特性。我们通过一个小型应用的成长演进来讲解它。参见<live-example>在线例子</live-example>。
+本章涵盖了该路由器的主要特性。我们通过一个小型应用的成长演进来讲解它。参见<live-example>在线例子</live-example>。
 
 <!-- style for all tables on this page -->
 <style>
@@ -5994,7 +5994,7 @@ You can provide optional route parameters in an object like this:
 These three examples cover the need for an app with one level routing.
 The moment you add a child router, such as the crisis center, you create new link array possibilities.
 
-这三个例子覆盖了我们在单级路由的应用中所需的一切。在添加一个像*危机中心*一样的子路由时，我们创建新链接数组组合。
+这三个例子涵盖了我们在单级路由的应用中所需的一切。在添加一个像*危机中心*一样的子路由时，我们创建新链接数组组合。
 
 Recall that you specified a default child route for the crisis center so this simple `RouterLink` is fine.
 

aio/content/guide/testing.md

@@ -1884,7 +1884,7 @@ The router seems particularly challenging.
 
 The [discussion below](guide/testing#routed-component) covers testing components that require the router.
 
-[下面](guide/testing#routed-component) 覆盖了如何测试带有路由器的组件。
+[下面](guide/testing#routed-component) 涵盖了如何测试带有路由器的组件。
 
 </div>
 

aio/content/guide/typescript-configuration.md

@@ -16,7 +16,7 @@ which requires some configuration.
 This page covers some aspects of TypeScript configuration and the TypeScript environment
 that are important to Angular developers, including details about the following files:
 
-本页面会覆盖TypeScript配置与环境的某些方面，这些对Angular开发者是很重要的。具体来说包括下列文件：
+本页面会涵盖TypeScript配置与环境的某些方面，这些对Angular开发者是很重要的。具体来说包括下列文件：
 
 * [tsconfig.json](guide/typescript-configuration#tsconfig) — TypeScript compiler configuration.
 

aio/content/tutorial/index.md

@@ -12,7 +12,7 @@ has many of the features you'd expect to find in a full-blown, data-driven app:
 a list of heroes, editing a selected hero's detail, and navigating among different
 views of heroic data.
 
-这篇《英雄指南》覆盖了 Angular 的核心原理。这次构建的应用会涉及很多特性：获得并显示英雄列表，编辑所选英雄的详情，并在英雄数据的多个视图之间建立导航。这些特性，在成熟的、数据驱动的应用中经常见到。
+这篇《英雄指南》涵盖`了 Angular 的核心原理。这次构建的应用会涉及很多特性：获得并显示英雄列表，编辑所选英雄的详情，并在英雄数据的多个视图之间建立导航。这些特性，在成熟的、数据驱动的应用中经常见到。
 
 You'll use built-in directives to show and hide elements and display lists of hero data.
 You'll create components to display hero details and show an array of heroes.
@@ -38,7 +38,7 @@ You'll cover a lot of ground at an introductory level, and you'll find many link
 to pages with greater depth.
 
 完成本教程后，我们将学习足够的 Angular 核心技术，并确信 Angular 确实能做到我们需要它做的。
-  我们将覆盖大量入门级知识，同时我们也会看到大量链接，指向更深入的章节。
+  我们将涵盖大量入门级知识，同时我们也会看到大量链接，指向更深入的章节。
 
 When you're done with this tutorial, the app will look like this <live-example name="toh-pt6"></live-example>.