diff --git a/C#.NET/source/Yitter.IdGenerator/Core/SnowWorkerM1.cs b/C#.NET/source/Yitter.IdGenerator/Core/SnowWorkerM1.cs
index dc91a05..f814551 100644
--- a/C#.NET/source/Yitter.IdGenerator/Core/SnowWorkerM1.cs
+++ b/C#.NET/source/Yitter.IdGenerator/Core/SnowWorkerM1.cs
@@ -49,7 +49,7 @@ namespace Yitter.IdGenerator
         protected readonly ushort MinSeqNumber = 0;
 
         /// <summary>
-        /// 最大漂移次数
+        /// 最大漂移次数（含）
         /// </summary>
         protected readonly int TopOverCostCount = 0;
 
diff --git a/Java/source/src/main/java/com/github/yitter/core/SnowWorkerM1.java b/Java/source/src/main/java/com/github/yitter/core/SnowWorkerM1.java
index 6246b96..47554bc 100644
--- a/Java/source/src/main/java/com/github/yitter/core/SnowWorkerM1.java
+++ b/Java/source/src/main/java/com/github/yitter/core/SnowWorkerM1.java
@@ -42,7 +42,7 @@ public class SnowWorkerM1 implements ISnowWorker {
     protected final short MinSeqNumber;
 
     /**
-     * 最大漂移次数
+     * 最大漂移次数（含）
      */
     protected final int TopOverCostCount;
 
@@ -143,7 +143,7 @@ public class SnowWorkerM1 implements ISnowWorker {
                 _TurnBackIndex++;
 
                 // 每毫秒序列数的前5位是预留位，0用于手工新值，1-4是时间回拨次序
-                // 最多4次回拨（防止回拨重叠）
+                // 支持4次回拨次序（避免回拨重叠导致ID重复），可无限次回拨（次序循环使用）。
                 if (_TurnBackIndex > 4) {
                     _TurnBackIndex = 1;
                 }