diff --git a/NFox/Cad/ExtendMethods/EntityEx.cs b/NFox/Cad/ExtendMethods/EntityEx.cs
index a3289c2ea5bb48d8f02feb05c06aab2e3a9ff6f2..a79f2c9ec9a239bb032a8a9b17dc854cf70a25b7 100644
--- a/NFox/Cad/ExtendMethods/EntityEx.cs
+++ b/NFox/Cad/ExtendMethods/EntityEx.cs
@@ -139,7 +139,7 @@ namespace NFox.Cad
         /// 缩放实体
         /// </summary>
         /// <param name="ent">实体</param>
-        /// <param name="center">缩放几点坐标</param>
+        /// <param name="center">缩放基点坐标</param>
         /// <param name="scaleValue">缩放比例</param>
         public static void Scale(this Entity ent, Point3d center, double scaleValue)
         {