Edit for clarity

Author: DeepAnchor

en/12.4.md

@@ -184,7 +184,7 @@ A Redis cold backup recovery simply involves copying backed-up database files in
 
 ## Summary
 
-In this section, we looked at some techniques for backing up data as well as recovering from disasters, after deploying our applications. We also introduced rsync, a tool which can be used to synchronize files on different systems. Using rsync, we can easily perform backup and restoration procedures for both MySQL and Redis databases, among others. We hope that by being introduced to some of these concepts, you will be able to develop disaster recovery procedures to better protect the data in your web applications.  
+In this section, we looked at some techniques for backing up data as well as recovering from disasters which may occur after deploying our applications. We also introduced rsync, a tool which can be used to synchronize files on different systems. Using rsync, we can easily perform backup and restoration procedures for both MySQL and Redis databases, among others. We hope that by being introduced to some of these concepts, you will be able to develop disaster recovery procedures to better protect the data in your web applications.  
 
 ## Links