完善BA所要求的英文翻译问题

src/i18n/locales/en-US.ts

@@ -357,6 +357,7 @@ export default {
         sync:'Synchronize to NE',
         open:'Open',
         close:'Close',
+        addFail:'Add failed',
       },
       backupManage: {
         setBackupTask: 'Set automatic backup time',
@@ -399,7 +400,7 @@ export default {
         neIdPlease: 'Please select the corresponding network element',
         versions:'Version',
         upVersions:'Version before upgrade',
-        backVersions:'Roll back to previous version',
+        backVersions:'Version before rollback',
         status:'Status',
         letUpTime:'Activation time',
         createTime:'Creation time',