diff --git a/public/_includes/_main-nav.jade b/public/_includes/_main-nav.jade
index 78496379fa..2e956635b9 100644
--- a/public/_includes/_main-nav.jade
+++ b/public/_includes/_main-nav.jade
@@ -13,6 +13,7 @@ md-toolbar(class="main-nav background-regal l-pinned-top l-layer-5",scroll-y-off
       li.l-left <a class="main-nav-button" href="/events.html" md-button>事件</a>
       li.l-left <a class="main-nav-button" href="/news.html" md-button>新闻</a>
       li.l-left <a class="main-nav-button" href="/translate/cn/about.html" md-button>关于中文版</a>
+      li.l-left <a class="main-nav-button" href="https://angular.io/" md-button>官网(被墙)</a>
       li.l-right <a class="main-nav-button" href="/docs/ts/latest/quickstart.html" md-button>立即开始！</a>
       li.l-right
         a.main-nav-button.md-button(ng-click="appCtrl.toggleSource($event)", href)
diff --git a/public/docs/ts/latest/guide/server-communication.jade b/public/docs/ts/latest/guide/server-communication.jade
index c53a5d8066..63c6bfb3a6 100644
--- a/public/docs/ts/latest/guide/server-communication.jade
+++ b/public/docs/ts/latest/guide/server-communication.jade
@@ -500,8 +500,8 @@ block parse-json
       
       `#{_priv}http.get`**仍然没有发送请求！**这是因为可观察对象是
       [*冷淡的*](https://github.com/Reactive-Extensions/RxJS/blob/master/doc/gettingstarted/creating.md#cold-vs-hot-observables)，
-      这意味着，知道有人*订阅*了这个可观察对象时，这个请求才会被发出。
-      这个场景中的*有人*就是[HeroListComponent](#subscribe)。
+      这意味着，直到某人*订阅*了这个可观察对象时，这个请求才会被发出。
+      这个场景中的*某人*就是[HeroListComponent](#subscribe)。
 
 a#error-handling
 :marked