diff --git a/docs/计算机网络/topdown_ustc.en.md b/docs/计算机网络/topdown_ustc.en.md
index d9a33c7c..1397736b 100644
--- a/docs/计算机网络/topdown_ustc.en.md
+++ b/docs/计算机网络/topdown_ustc.en.md
@@ -9,7 +9,7 @@
 - Difficulty: 🌟🌟🌟
 - Class Hour: 40 hours
 
-This course is a well-known computer networking course on the Chinese Internet, it adopts the renowned textbook: Computer Networking: A Top-Down Approach, 7th Edition. The lecture style is more practical than purely theoretical (**Strongly recommended** to read the textbook before watching the course, otherwise you *may* not understand the course).
+This course is a well-known computer networking course on the Chinese Internet, it adopts the renowned textbook: `Computer Networking: A Top-Down Approach, 7th Edition`. The lecture style is more practical than purely theoretical (**Strongly recommended** to read the textbook before watching the course, otherwise you *may* not understand the course).
 
 The course covers the **majority** of the textbook and also **includes** exam content, so enjoy it.
 
@@ -20,4 +20,4 @@ The recordings of the course were uploaded by Dr. Zheng himself on Bilibili. Mor
 - Course Website: <http://staff.ustc.edu.cn/~qzheng/teaching.html>
 - Recordings: <https://www.bilibili.com/video/BV1JV411t7ow/>
 - Slides: <http://staff.ustc.edu.cn/~qzheng/cn.zip>
-- Textbook: Computer Networking: A Top-Down Approach, 7th Edition
\ No newline at end of file
+- Textbook: Computer Networking: A Top-Down Approach, 7th Edition