diff --git a/docs/操作系统/CS162.en.md b/docs/操作系统/CS162.en.md
index de452f80..0c793257 100644
--- a/docs/操作系统/CS162.en.md
+++ b/docs/操作系统/CS162.en.md
@@ -23,8 +23,8 @@ Although it is tough, Stanford, Berkeley, JHU and many other top U.S. colleges h
 ## Course Resources
 
 - Course Website: <https://cs162.org/>
-- Lecture Videos：<https://www.youtube.com/watch?v=YfHY0pvpRkk>, videos for each lecture can be found on the course website.
-- Textbook:[Operating Systems: Principles and Practice (2nd Edition)](http://ospp.cs.washington.edu/)
+- Lecture Videos: <https://www.youtube.com/watch?v=YfHY0pvpRkk>, videos for each lecture can be found on the course website.
+- Textbook: [Operating Systems: Principles and Practice (2nd Edition)](http://ospp.cs.washington.edu/)
 - Assignments: <https://cs162.org/>, 6 Homework, 3 Projects, the course website has specific requirements
 
 ## Personal Resources