diff --git a/en/application-dev/reference/apis/js-apis-avsession.md b/en/application-dev/reference/apis/js-apis-avsession.md
index d463971e0e64c2e7555222e033414bf22d36beb9..f1460b6e46056ecad714b5e17f87639991041082 100644
--- a/en/application-dev/reference/apis/js-apis-avsession.md
+++ b/en/application-dev/reference/apis/js-apis-avsession.md
@@ -4343,7 +4343,7 @@ aVCastController.sendControlCommand(avCommand, (err: BusinessError) => {
 
 prepare(item: AVQueueItem, callback: AsyncCallback\<void>): void
 
-Prepares for the playback of a media asset. This API uses an asynchronous callback to return the result.
+Prepares for the playback of a media asset, that is, loads and buffers a media asset. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.Multimedia.AVSession.AVCast
 
@@ -4401,7 +4401,7 @@ aVCastController.prepare(playItem, (err: BusinessError) => {
 
 prepare(item: AVQueueItem): Promise\<void>
 
-Prepares for the playback of a media asset. This API uses a promise to return the result.
+Prepares for the playback of a media asset, that is, loads and buffers a media asset. This API uses a promise to return the result.
 
 
 **System capability**: SystemCapability.Multimedia.AVSession.AVCast
@@ -4463,7 +4463,7 @@ aVCastController.prepare(playItem).then(() => {
 
 start(item: AVQueueItem, callback: AsyncCallback\<void>): void
 
-Prepares for the playback of a media asset. This API uses an asynchronous callback to return the result.
+Start playing a certain media resource. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.Multimedia.AVSession.AVCast
 
@@ -4521,7 +4521,7 @@ aVCastController.start(playItem, (err: BusinessError) => {
 
 start(item: AVQueueItem): Promise\<void>
 
-Prepares for the playback of a media asset. This API uses a promise to return the result.
+Start playing a certain media resource. This API uses a promise to return the result.
 
 
 **System capability**: SystemCapability.Multimedia.AVSession.AVCast