diff --git a/Introduction.md b/Introduction.md
index 6bf8865..b800d22 100644
--- a/Introduction.md
+++ b/Introduction.md
@@ -173,9 +173,9 @@
 	Header
 		logfileName [binlog文件名]
 		logfileOffset [binlog position]
-		executeTime [发生的变更]
-		schemaName 
-		tableName
+		executeTime [binlog里记录变更发生的时间戳]
+		schemaName [数据库实例]
+		tableName [表名]
 		eventType [insert/update/delete类型]
 	entryType 	[事务头BEGIN/事务尾END/数据ROWDATA]
 	storeValue 	[byte数据,可展开，对应的类型为RowChange]
@@ -188,7 +188,7 @@ RowChange
 		afterColumns [Column类型的数组]
 		
 Column 
-	index		
+	index		[column序号]
 	sqlType		[jdbc type]
 	name		[column name]
 	isKey		[是否为主键]