diff --git a/content/LangChain for LLM Application Development/5. 评估.ipynb b/content/LangChain for LLM Application Development/5. 评估.ipynb
index 2dd33a2..081a749 100644
--- a/content/LangChain for LLM Application Development/5. 评估.ipynb	
+++ b/content/LangChain for LLM Application Development/5. 评估.ipynb	
@@ -215,17 +215,6 @@
     "test_data"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "5bb816a6",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import os\n",
-    "os.environ[\"OPENAI_API_KEY\"] = \"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\""
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 10,