diff --git a/lectures/hoist_failure.md b/lectures/hoist_failure.md
index 107b5dbd..8775a841 100644
--- a/lectures/hoist_failure.md
+++ b/lectures/hoist_failure.md
@@ -31,31 +31,6 @@ translation:
     Exercises: 练习
 ---
 
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-  text_representation:
-    extension: .md
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-  display_name: Python 3
-  language: python
-  name: python3
-translation:
-  title: 故障树不确定性
-  headings:
-    Overview: 概述
-    The lognormal distribution: 对数正态分布
-    The convolution theorem: 卷积定理
-    Approximating continuous distributions: 近似连续分布
-    Discretizing the lognormal distribution: 离散化对数正态分布
-    Convolving probability mass functions: 概率质量函数的卷积
-    Fault tree analysis: 故障树分析
-    Failure rates unknown: 未知的故障率
-    Application: waste hoist failure rate: 应用：废物提升机失效率
-    Exercises: 练习
----
-
 ```{raw} jupyter
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