diff --git a/doc/report.docx b/doc/report.docx
index 08f2cf0..f6dbca8 100644
Binary files a/doc/report.docx and b/doc/report.docx differ
diff --git a/src/main/java/net/micode/notes/gtask/data/MetaData.java b/src/main/java/net/micode/notes/gtask/data/MetaData.java
index 3a2050b..e7f8fb7 100644
--- a/src/main/java/net/micode/notes/gtask/data/MetaData.java
+++ b/src/main/java/net/micode/notes/gtask/data/MetaData.java
@@ -50,7 +50,7 @@ public class MetaData extends Task {
     }
 
     @Override
-    public void setContentByRemoteJSON(JSONObject js) {
+    public void setContentByRemoteJSON(JSONObject js) {//用远程的json
         super.setContentByRemoteJSON(js);
         if (getNotes() != null) {
             try {
@@ -64,7 +64,7 @@ public class MetaData extends Task {
     }
 
     @Override
-    public void setContentByLocalJSON(JSONObject js) {
+    public void setContentByLocalJSON(JSONObject js) {//这几个函数都是通过一部分已知的项推算其他未知的
         // this function should not be called
         throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
     }
diff --git a/src/main/java/net/micode/notes/gtask/data/Node.java b/src/main/java/net/micode/notes/gtask/data/Node.java
index 63950e0..3a11067 100644
--- a/src/main/java/net/micode/notes/gtask/data/Node.java
+++ b/src/main/java/net/micode/notes/gtask/data/Node.java
@@ -64,9 +64,9 @@ public abstract class Node {
 
     public abstract JSONObject getLocalJSONFromContent();
 
-    public abstract int getSyncAction(Cursor c);
+    public abstract int getSyncAction(Cursor c);//根据当前指针刷新缓冲区
 
-    public void setGid(String gid) {
+    public void setGid(String gid) {//定义各项简单查询操作的返回值
         this.mGid = gid;
     }
 
@@ -82,7 +82,7 @@ public abstract class Node {
         this.mDeleted = deleted;
     }
 
-    public String getGid() {
+    public String getGid() {//this保证指向的还是当前的对象
         return this.mGid;
     }
 
diff --git a/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java b/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
index 15504be..83424dc 100644
--- a/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
+++ b/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
@@ -16,7 +16,7 @@
 
 package net.micode.notes.gtask.exception;
 
-public class ActionFailureException extends RuntimeException {
+public class ActionFailureException extends RuntimeException {//异常处理程序，定义了全部可能参数下抛出错误
     private static final long serialVersionUID = 4425249765923293627L;
 
     public ActionFailureException() {
diff --git a/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java b/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
index b08cfb1..66d6749 100644
--- a/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
+++ b/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package net.micode.notes.gtask.exception;
+package net.micode.notes.gtask.exception;//调用完成异常处理
 
 public class NetworkFailureException extends Exception {
     private static final long serialVersionUID = 2107610287180234136L;