diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index b544d7b..17c844d 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1077,6 +1077,7 @@
 						- DONE Meaning of serialisability. #flashcard
 						  id:: 648428e1-5136-4d15-97c0-12087085b47f
 							- The objective of serialisability is to find nonserial schedules that are equivalent to some serial schedule. Such a schedule is called serialisable.
+							- Meaning of serialisability.
 						- DONE How locking can ensure serialisability. #flashcard
 						  id:: 64841da4-8812-405f-b49a-69eec9a069d2
 							- Locking achieves serializability by using locks to control access to