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diff --git a/doc/小米便签质量分析报告.docx b/doc/小米便签质量分析报告.docx
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diff --git a/src/net/micode/notes/data/Notes.java b/src/net/micode/notes/data/Notes.java
index f2cf06d..71db248 100644
--- a/src/net/micode/notes/data/Notes.java
+++ b/src/net/micode/notes/data/Notes.java
@@ -15,7 +15,7 @@
  */
 
 package net.micode.notes.data;
-
+// Notes 类是整个笔记系统的核心数据结构定义类
 import android.net.Uri;
 public class Notes {
         /**
diff --git a/src/net/micode/notes/gtask/remote/GTaskClient.java b/src/net/micode/notes/gtask/remote/GTaskClient.java
index 76ecdbe..6640e34 100644
--- a/src/net/micode/notes/gtask/remote/GTaskClient.java
+++ b/src/net/micode/notes/gtask/remote/GTaskClient.java
@@ -117,7 +117,7 @@ public class GTaskClient {
         }
         return mInstance;
     }
-
+// 登录 Google Tasks 服务，检查是否需要重新登录或切换账户，尝试通过 Google 账户授权 Token 登录
     public boolean login(Activity activity) {
         // we suppose that the cookie would expire after 5 minutes
         // then we need to re-login
@@ -172,7 +172,7 @@ public class GTaskClient {
         mLoggedin = true;
         return true;
     }
-
+// 获取当前设备上配置的 Google 账户及其认证 Token，若需要则使旧 Token 失效并重新获取
     private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
         String authToken;
         AccountManager accountManager = AccountManager.get(activity);