update doc

Signed-off-by: Nshawn_he <shawn.he@huawei.com>

en/application-dev/dfx/hiappevent-guidelines.md

@@ -2,13 +2,13 @@
 
 ## When to Use
 
-The event logging function helps applications log various information generated during running.
+The event logging function helps applications to log various information generated during running.
 
 ## Available APIs
 
 JS application event logging APIs are provided by the **hiAppEvent** module.
 
-**APIs for Event Logging**
+**Table 1** APIs for event logging
 
 | API                                                          | Return Value   | Description                                                  |
 | ------------------------------------------------------------ | -------------- | ------------------------------------------------------------ |
@@ -17,7 +17,7 @@ JS application event logging APIs are provided by the **hiAppEvent** module.
 
 When an asynchronous callback is used, the return value can be processed directly in the callback. When a promise is used, the return value can also be processed in the promise in a similar way. For details about the result codes, see [Event Verification Result Codes](#event-verification-result-codes).
 
-**APIs for Event Logging Configuration**
+**Table 1** APIs for event logging configuration
 
 | API                            | Return Value | Description                                                  |
 | ------------------------------ | ------------ | ------------------------------------------------------------ |

en/application-dev/dfx/hiappevent-overview.md

@@ -2,8 +2,10 @@
 
 HiAppEvent provides event logging APIs for applications to log the fault, statistical, security, and user behavior events reported during running. Based on event information, you will be able to analyze the running status of your application.
 
+The HiAppEvent module of OpenHarmony can be used to develop application event services and provide functions related to application events, including flushing application events to a disk and querying historical application event data.
+
 ## Basic Concepts
 
-The HiAppEvent module of OpenHarmony can be used to develop application event services and provide functions related to application events, including flushing application events to a disk and querying historical application event data.
+- **Logging**
 
-**Logging**: Logs changes caused by user operations to provide service data for development, product, and O&M analysis.
+  Logs changes caused by user operations to provide service data for development, product, and O&M analysis.

en/application-dev/dfx/hitracemeter-guidelines.md

@@ -8,7 +8,7 @@ HiTraceMeter provides APIs for system performance tracing. You can call the APIs
  
 The performance tracing APIs are provided by the **hiTraceMeter** module. For details, see [API Reference]( ../reference/apis/js-apis-hitracemeter.md).
 
-**APIs for performance tracing**
+**Table 1** APIs for performance tracing
 
 | API| Return Value| Description|
 | ---------------------------------------------------------------------------- | --------- | ------------ |

en/application-dev/dfx/hitracemeter-overview.md

@@ -15,4 +15,4 @@ hiTraceMeter is a tool for you to trace service processes and monitor system per
 
 ## Constraints
 
-- Due to the asynchronous I/O feature of JS, the hiTraceMeter module provides only asynchronous APIs.
+Due to the asynchronous I/O feature of JS, the hiTraceMeter module provides only asynchronous APIs.