diff --git a/assets/section_2.5_1686968005870_0.edn b/assets/section_2.5_1686968005870_0.edn
index f3a1b00..2ed34de 100644
--- a/assets/section_2.5_1686968005870_0.edn
+++ b/assets/section_2.5_1686968005870_0.edn
@@ -81,5 +81,17 @@
                           :rects (),
                           :page 21},
                :content {:text "[:span]", :image 1686972385817},
+               :properties {:color "yellow"}}
+              {:id #uuid "648d2884-c239-4d00-9b6f-291bf4280dab",
+               :page 25,
+               :position {:bounding {:x1 38,
+                                     :y1 123.666015625,
+                                     :x2 647,
+                                     :y2 408.666015625,
+                                     :width 677.2919999999999,
+                                     :height 507.96853333333326},
+                          :rects (),
+                          :page 25},
+               :content {:text "[:span]", :image 1686972547449},
                :properties {:color "yellow"}}],
- :extra {:page 21}}
+ :extra {:page 25}}
diff --git a/assets/section_2.5_1686968005870_0/25_648d2884-c239-4d00-9b6f-291bf4280dab_1686972547449.png b/assets/section_2.5_1686968005870_0/25_648d2884-c239-4d00-9b6f-291bf4280dab_1686972547449.png
new file mode 100644
index 0000000..8a695c4
Binary files /dev/null and b/assets/section_2.5_1686968005870_0/25_648d2884-c239-4d00-9b6f-291bf4280dab_1686972547449.png differ
diff --git a/pages/hls__section_2.5_1686968005870_0.md b/pages/hls__section_2.5_1686968005870_0.md
index 15eeb77..3d5b096 100644
--- a/pages/hls__section_2.5_1686968005870_0.md
+++ b/pages/hls__section_2.5_1686968005870_0.md
@@ -49,4 +49,11 @@ file-path:: ../assets/section_2.5_1686968005870_0.pdf
   hl-color:: yellow
   id:: 648d27e3-1886-4b09-a18d-8a89d33e745a
   hl-type:: area
-  hl-stamp:: 1686972385817
\ No newline at end of file
+  hl-stamp:: 1686972385817
+- [:span]
+  ls-type:: annotation
+  hl-page:: 25
+  hl-color:: yellow
+  id:: 648d2884-c239-4d00-9b6f-291bf4280dab
+  hl-type:: area
+  hl-stamp:: 1686972547449
\ No newline at end of file
diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index aa59dec..afe63d6 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2817,10 +2817,12 @@
 									- Mean, variance :-> ((648d25a0-12d9-47c5-b9ca-f7cafdf15d89))
 									- Memory-less #flashcard
 										- ((648d26c8-0292-4c02-8d6e-2b4f5cb10385))
-								- LATER Example
+								- LATER Example: connection between Poisson and Exponential distribution
 									- ((648d27e3-1886-4b09-a18d-8a89d33e745a))
-								-
 						- Normal Distribution
+							- Definition
+								- ((648d2884-c239-4d00-9b6f-291bf4280dab))
+								-
 			- LATER 学积分
 			  :LOGBOOK:
 			  CLOCK: [2023-06-03 Sat 17:05:07]--[2023-06-03 Sat 17:05:08] =>  00:00:01