Update tidb-lightning/tidb-lightning-physical-import-mode.md

tidb-lightning/tidb-lightning-physical-import-mode.md

@@ -96,6 +96,6 @@ It is recommended that you allocate CPU more than 32 cores and memory greater th
 
 - When you use TiDB Lightning with BR, note the following:
 
-    - Snapshot backups by BR of tables being imported by Lightning may result in inconsistent backup data for those tables.
-    - BR performing backups based on AWS EBS volume snapshots may lead to data import failures via Lightning.
-    - Point-in-Time Recovery (PiTR) is incapable of backing up data imported by Lightning.
+    - When BR backs up snapshots of tables that are being imported by TiDB Lightning, it might result in inconsistent backup data for those tables.
+    - When BR backs up data based on the AWS EBS volume snapshots, TiDB Lightning might fail to import data.
+    - Point-in-Time Recovery (PiTR) can not back up data imported by TiDB Lightning.