diff --git a/assets/scripts/util.js b/assets/scripts/util.js
index a9eddba..04bdd0d 100644
--- a/assets/scripts/util.js
+++ b/assets/scripts/util.js
@@ -27,34 +27,34 @@ function customCssWithTemplate(template) {
 
 let customCss = customCssWithTemplate(default_theme);
 
-// css转json
+
+/**
+ * 将CSS形式的字符串转换为JSON
+ * 
+ * @param {css字符串} css 
+ */
 function css2json(css) {
 
-    // Remove all comments from the css-file
+    // 移除CSS所有注释
     while ((open = css.indexOf("/*")) !== -1 &&
         (close = css.indexOf("*/")) !== -1) {
         css = css.substring(0, open) + css.substring(close + 2);
     }
 
-    // Initialize the return value _json_.
+    // 初始化返回值
     let json = {};
 
-    // Each rule gets parsed and then removed from _css_ until all rules have been
-    // parsed.
     while (css.length > 0) {
-        // Save the index of the first left bracket and first right bracket.
+        // 存储第一个左/右花括号的下标
         const lbracket = css.indexOf('{');
         const rbracket = css.indexOf('}');
 
-        // ## Part 1: The declarations
-        //
-        // Transform the declarations to an object. For example, the declarations<br/>
-        //  `font: 'Times New Roman' 1em; color: #ff0000; margin-top: 1em;`<br/>
-        // result in the object<br/>
-        // `{"font": "'Times New Roman' 1em", "color": "#ff0000", "margin-top": "1em"}`.
-
-        // Helper method that transform an array to a object, by splitting each
-        // declaration (_font: Arial_) into key (_font_) and value(_Arial_).
+        // 第一步：将声明转换为Object，如：
+        // `font: 'Times New Roman' 1em; color: #ff0000; margin-top: 1em;` 
+        //  ==>
+        // `{"font": "'Times New Roman' 1em", "color": "#ff0000", "margin-top": "1em"}`
+        
+        // 辅助方法：将array转为object
         function toObject(array) {
             let ret = {};
             array.forEach(e => {
@@ -66,43 +66,41 @@ function css2json(css) {
             return ret;
         }
 
-        // Split the declaration block of the first rule into an array and remove
-        // whitespace from each declaration.
+        // 切割声明块并移除空白符，然后放入数组中
         let declarations = css.substring(lbracket + 1, rbracket)
             .split(";")
             .map(e => e.trim())
-            .filter(e => e.length > 0); // Remove any empty ("") values from the array
+            .filter(e => e.length > 0); // 移除所有""空值
 
-        // _declaration_ is now an array reado to be transformed into an object.
+        // 转为Object对象
         declarations = toObject(declarations);
 
-        // ## Part 2: The selectors
-        //
-        // Each selector in the selectors block will be associated with the
-        // declarations defined above. For example, `h1, p#bar {color: red}`<br/>
-        // result in the object<br/>
+
+
+        // 第二步：选择器处理，每个选择器会与它对应的声明相关联，如：
+        // `h1, p#bar {color: red}`
+        // ==>
         // {"h1": {color: red}, "p#bar": {color: red}}
 
-        // Split the selectors block of the first rule into an array and remove
-        // whitespace, e.g. `"h1, p#bar, span.foo"` get parsed to
-        // `["h1", "p#bar", "span.foo"]`.
         let selectors = css.substring(0, lbracket)
+            // 以,切割，并移除空格：`"h1, p#bar, span.foo"` => ["h1", "p#bar", "span.foo"]
             .split(",")
             .map(selector => selector.trim());
 
-        // Iterate through each selector from _selectors_.
+        // 迭代赋值
         selectors.forEach(selector => {
-            // Initialize the json-object representing the declaration block of
-            // _selector_.
+            // 若不存在，则先初始化
             if (!json[selector]) json[selector] = {};
-            // Save the declarations to the right selector
+            // 赋值到JSON
             Object.keys(declarations).forEach(key => {
                 json[selector][key] = declarations[key];
             });
         });
-        // Continue to next instance
+
+        // 继续下个声明块
         css = css.slice(rbracket + 1).trim()
     }
-    // return the json data
+    
+    // 返回JSON形式的结果串
     return json;
-}
+}
\ No newline at end of file