fix comments

Author: Xiyao Dong

articles/batch/batch-compute-node-environment-variables.md

@@ -35,7 +35,7 @@ The command lines executed by tasks on compute nodes don't run under a shell. Th
 > `AZ_BATCH_AUTHENTICATION_TOKEN` is deprecated and will be retired on September 30, 2024. See the [announcement](https://azure.microsoft.com/updates/azure-batch-task-authentication-token-will-be-retired-on-30-september-2024/) for details and alternative implementation.
 
 > [!NOTE]
-> The real directories and files location in example may change, using environment variable to access directories and files managed by batch is better.
+> The directory path and environment variable values in the examples below are implementation details and should not be considered immutable. As these values may change at any time, the use of environment variables instead of hardcoding the values or path structures is recommended.
 
 
 | Variable name                     | Description                                                              | Availability | Example |

articles/batch/files-and-directories.md

@@ -50,6 +50,8 @@ The value of the `AZ_BATCH_NODE_ROOT_DIR` compute node environment variable will
 |No|Windows|`C:\batch\data`|
 |Yes|Windows|`D:\batch`|
 
+These environment variable values are implementation details and should not be considered immutable. As these values may change at any time, the use of environment variables instead of hardcoding the value is recommended.
+
 ## Next steps
 
 - Learn about [error handling and detection](error-handling.md) in Azure Batch.