diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index de8ea08..ed74e30 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2234,8 +2234,10 @@
 					  id:: 648afdb9-5c43-4adb-b7a9-45fcd8b28d74
 						- **Learning**
 						- **Communication**: to get feedback
-						- Make models with a **defined purpose**
-						- Consider **multiple forms** of prototypes
+						- **Integration**: to ensure that components
+						  and subsystems of the product **work together** as
+						  expected
+						- **Milestones**
 						- Choose the **timing** of prototype cycles
 							- Many early models are used validate concepts
 							- Relatively few comprehensive models are necessary to test integration