diff --git a/src/org/redkale/source/Range.java b/src/org/redkale/source/Range.java
index b78e820a5..02f3d490a 100644
--- a/src/org/redkale/source/Range.java
+++ b/src/org/redkale/source/Range.java
@@ -9,6 +9,7 @@ import java.util.function.*;
 
 /**
  *
+ *  包含两边的值
  * <p>
  * 详情见: https://redkale.org
  *