revise wording

Co-authored-by: Grace Cai <qqzczy@126.com>

Author: Oreoxmt

en/exceptions.md

@@ -5,7 +5,7 @@ summary: Learn the common exceptions during the operation of TiDB clusters on Ku
 
 # Common Cluster Exceptions of TiDB on Kubernetes
 
-This document describes the common exceptions during the operation of TiDB clusters on Kubernetes and their solutions.
+This document describes common exceptions during the operation of TiDB clusters on Kubernetes and their solutions.
 
 ## Persistent connections are abnormally terminated in TiDB
 
@@ -14,9 +14,9 @@ Load balancers often set the idle connection timeout. If no data is sent via a c
 - If a persistent connection is terminated when you use TiDB, check the middleware program between the client and the TiDB server.
 - If the idle timeout is not long enough for your query, try to set the timeout to a larger value. If you cannot reset it, enable the `tcp-keep-alive` option in TiDB.
 
-In Linux, the keepalive probe packet is sent every 7,200 seconds by default. To shorten the interval, configure `sysctls` via the `podSecurityContext` field.
+On Linux, the keepalive probe packet is sent every 7,200 seconds by default. To shorten the interval, configure `sysctls` via the `podSecurityContext` field.
 
-- If `--allowed-unsafe-sysctls=net.*` can be configured for [kubelet](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/) in the Kubernetes cluster, configure TiDBGroup using the [Overlay](overlay.md) feature in the following way:
+- If `--allowed-unsafe-sysctls=net.*` can be configured for [kubelet](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/) in the Kubernetes cluster, configure TiDBGroup using the [Overlay](overlay.md) feature as follows:
 
     ```yaml
     apiVersion: core.pingcap.com/v1alpha1
@@ -33,7 +33,7 @@ In Linux, the keepalive probe packet is sent every 7,200 seconds by default. To
                       value: "300"
     ```
 
-- If `--allowed-unsafe-sysctls=net.*` cannot be configured for [kubelet](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/) in the Kubernetes cluster, configure TiDBGroup using the [Overlay](overlay.md) feature in the following way:
+- If `--allowed-unsafe-sysctls=net.*` cannot be configured for [kubelet](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/) in the Kubernetes cluster, configure TiDBGroup using the [Overlay](overlay.md) feature as follows:
 
     ```yaml
     apiVersion: core.pingcap.com/v1alpha1