diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 50959c5..085bc03 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1093,7 +1093,7 @@
 						  columns.
 						- Third Normal Form (3NF): :->  3NF builds on 2NF by requiring
 						  id:: 648974ba-f325-450e-aede-9a7d92bcf888
-						  that _all non-key attributes are independent of each other._ This means that each column should be directly related to the primary key, and not to any other columns in the same table.
+						  that _all non-key attributes are **independent** of each other._ This means that each column should be directly related to the primary key, and not to any other columns in the same table.
 						- Boyce-Codd Normal Form (BCNF): :->  BCNF is a stricter form of 3NF that ensures that each determinant in a table is a candidate key. In other words, BCNF ensures that _each non-key attribute is dependent only on the candidate key._
 						  id:: 64842000-c15a-4b8f-95c3-d6c6e49e4af0
 						- Fourth Normal Form (4NF): 4NF is a further refinement of BCNF that ensures that _a table does not contain any multi-valued dependencies._