diff --git a/assets/section_3.1_1686980736370_0.edn b/assets/section_3.1_1686980736370_0.edn
index 55dbbf3..cdce45b 100644
--- a/assets/section_3.1_1686980736370_0.edn
+++ b/assets/section_3.1_1686980736370_0.edn
@@ -21,5 +21,17 @@
                           :rects (),
                           :page 7},
                :content {:text "[:span]", :image 1686981466640},
+               :properties {:color "yellow"}}
+              {:id #uuid "648d4b7a-64fa-4e2a-a5db-4970c647527c",
+               :page 8,
+               :position {:bounding {:x1 48,
+                                     :y1 81.833251953125,
+                                     :x2 682,
+                                     :y2 527.833251953125,
+                                     :width 725.67,
+                                     :height 544.252},
+                          :rects (),
+                          :page 8},
+               :content {:text "[:span]", :image 1686981496480},
                :properties {:color "yellow"}}],
- :extra {:page 8}}
+ :extra {:page 10}}
diff --git a/assets/section_3.1_1686980736370_0/8_648d4b7a-64fa-4e2a-a5db-4970c647527c_1686981496480.png b/assets/section_3.1_1686980736370_0/8_648d4b7a-64fa-4e2a-a5db-4970c647527c_1686981496480.png
new file mode 100644
index 0000000..327b3e2
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diff --git a/pages/hls__section_3.1_1686980736370_0.md b/pages/hls__section_3.1_1686980736370_0.md
index a92ca65..b106301 100644
--- a/pages/hls__section_3.1_1686980736370_0.md
+++ b/pages/hls__section_3.1_1686980736370_0.md
@@ -14,4 +14,11 @@ file-path:: ../assets/section_3.1_1686980736370_0.pdf
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   hl-type:: area
-  hl-stamp:: 1686981466640
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+  hl-stamp:: 1686981466640
+- [:span]
+  ls-type:: annotation
+  hl-page:: 8
+  hl-color:: yellow
+  id:: 648d4b7a-64fa-4e2a-a5db-4970c647527c
+  hl-type:: area
+  hl-stamp:: 1686981496480
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index e1059ee..064d094 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2870,7 +2870,8 @@
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 							- Properties
 								- ((648d4b39-6c56-4dd6-af90-c3e1e81e90ff))
-								-
+								- Marginal Distribution:
+									- ((648d4b7a-64fa-4e2a-a5db-4970c647527c))
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01