diff --git a/Book1_Ch05_Python_Codes/Bk1_Ch05_15.ipynb b/Book1_Ch05_Python_Codes/Bk1_Ch05_15.ipynb
index 4b1e319..4f67ab7 100644
--- a/Book1_Ch05_Python_Codes/Bk1_Ch05_15.ipynb
+++ b/Book1_Ch05_Python_Codes/Bk1_Ch05_15.ipynb
@@ -51,7 +51,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# 只深复制一层\n",
+    "# 只复制一层\n",
     "list2 = list1.copy() "
    ]
   },