diff --git a/docs/design_docs/drop_collection_release_resources_en.md b/docs/design_docs/drop_collection_release_resources_en.md
index b33b2c490d..993774df6c 100644
--- a/docs/design_docs/drop_collection_release_resources_en.md
+++ b/docs/design_docs/drop_collection_release_resources_en.md
@@ -75,7 +75,7 @@ message SegmentBinlogPaths {
 
 ---
 
-## Object2: DataCoord GC for not in used binlogs
+## Object2: DataCoord Garbage Collection (GC) for not in used binlogs
 
 ### How to clear unknown binlogs?
 DataCoord runs a background GC goroutine, triggers every 1 day: