diff --git a/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java b/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java
index c23280e..fa4344a 100644
--- a/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java
+++ b/src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java
@@ -163,7 +163,7 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         if (mPlayer != null) {
             mPlayer.stop(); // 停止播放
             mPlayer.release(); // 释放资源
-            mPlayer = null; // 置空
+            mPlayer = null; // 置空。
         }
     }
 }