初步实现了对照翻译功能：自动隐藏原文，并把原文的文本内容设置为译文的title

public/_includes/_scripts-include.jade

@@ -15,6 +15,7 @@ script(src="/resources/js/vendor/angular-material.min.js")
 
 
 <!-- Angular.io Site JS -->
+script(src="/resources/js/translate.js")
 script(src="/resources/js/site.js")
 script(src="/resources/js/controllers/app-controller.js")
 script(src="/resources/js/directives/cheatsheet.js")

public/about/index.jade

@@ -8,6 +8,7 @@
       making web development feel effortless. We believe that writing
       beautiful apps should be joyful and fun. We're building a
       platform for the future.
+    p.text-body.
       Angular由一个工程师组织打造，我们拥有共同的热情 —— 让Web开发变得更简单。我们深信，写漂亮的程序快乐而有趣。
       我们正在构建一个面向未来的平台。
 

public/docs/ts/latest/quickstart.jade

@@ -53,9 +53,9 @@ figure.image-display
     
     在此日程中，我们将会看到很多代码块。它们都很容易拷贝和粘贴：
   code-example(format='.', language='html').
-    Click the glyph on the right to copy code snippets to the clipboard  ⇨⇨⇨⇨⇨⇨⇨⇨⇨⇨
+    Click the glyph on the right to copy code snippets to the clipboard ==========>
 
-    点击右边的图标来把代码片段拷贝到剪贴板 ⇨⇨⇨⇨⇨⇨⇨⇨⇨⇨
+    点击右边的图标来把代码片段拷贝到剪贴板 ==========>
 
 button(class="verbose off md-primary md-button md-ink-ripple", type="button", onclick="verbose(false)").
   Hide explanations
@@ -82,6 +82,7 @@ a(id="devenv")
   ## 开发环境
 
   We need to set up our development environment: 
+  
   我们要设置开发环境：
   * install node and npm
   * 安装 node 和 npm

public/resources/css/_translate.scss

@@ -0,0 +1,3 @@
+.hidden {
+  display: none !important;
+}

public/resources/css/main.scss

@@ -9,6 +9,7 @@
 @import 'theme';
 @import 'base/reset';
 @import 'base/type';
+@import "translate";
 @import 'angular';
 
 

public/resources/js/translate.js

@@ -0,0 +1,38 @@
+(function () {
+  var targets = document.querySelectorAll('p, li, h1, h2, h3, h4, h5, h6, header, a, button');
+  _.each(targets, function (node) {
+    if (isTranslationResult(node)) {
+      var prevNode = node.previousElementSibling;
+      if (prevNode && !prevNode.classList.contains('nav-list-item')) {
+        prevNode.classList.add('hidden');
+      }
+      node.title = prevNode.innerText;
+    }
+  });
+
+  function isOriginalEnglish(text) {
+    return /[\1-\255⇨]/.test(text);
+  }
+
+  function isClonedNode(node1, node2) {
+    return node1.parentNode === node2.parentNode && node1.tagName === node2.tagName && node1.className === node2.className;
+  }
+
+  function indexOf(node) {
+    var i = 0;
+    var aNode = node.parentNode.firstChild;
+    while (aNode !== node) {
+      ++i;
+      if (aNode.tagName !== node.tagName) {
+        i = 0;
+      }
+      aNode = aNode.nextElementSibling;
+    }
+    return i;
+  }
+
+  function isTranslationResult(node) {
+    var prevNode = node.previousElementSibling;
+    return indexOf(node) % 2 === 1 && prevNode && isClonedNode(node, prevNode) && isOriginalEnglish(prevNode.innerText);
+  }
+})();