diff --git a/assets/section_3.1_1686980736370_0.edn b/assets/section_3.1_1686980736370_0.edn
index 4f30da4..222f209 100644
--- a/assets/section_3.1_1686980736370_0.edn
+++ b/assets/section_3.1_1686980736370_0.edn
@@ -135,4 +135,4 @@
                           :page 27},
                :content {:text "[:span]", :image 1686983569626},
                :properties {:color "yellow"}}],
- :extra {:page 42}}
+ :extra {:page 41}}
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index c892400..39f74d5 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2892,7 +2892,7 @@
 						- Continuous random vector
 							- Definition of jpdf:
 								- ((648d525e-f08f-4838-9103-0218fb369579))
-							- Calculating pdf and d.f
+							- Calculating p.d.f. from d.f
 								- ((648d5392-d808-41be-82da-e23934db4f9f))
 								-
 			- LATER 学积分