update en/application-dev/internationalization/intl-guidelines.md.

Signed-off-by: Nking_he <6384784@qq.com>

en/application-dev/internationalization/intl-guidelines.md

@@ -89,7 +89,7 @@ Use [DateTimeFormat](../reference/apis/js-apis-intl.md) APIs to format the date
    ```
 
 2. Format the date and time.<br>
-   Call the **format** method to format a **Date** object. This method returns a string representing the formatting result.
+   Call the **format** method to format the date and time in the DateTimeFormat object. This method returns a string representing the formatting result.
      
    ```
    Date date = new Date();
@@ -97,7 +97,7 @@ Use [DateTimeFormat](../reference/apis/js-apis-intl.md) APIs to format the date
    ```
 
 3. Format a period.<br>
-   Call the **formatRange** method to format a period. This method requires input of two **Date** objects, which respectively indicate the start date and end date of a period. This method returns a string representing the formatting result.
+   Call the **formatRange** method to format the period in the **DateTimeFormat** object. This method requires input of two **Date** objects, which respectively indicate the start date and end date of a period. This method returns a string representing the formatting result.
      
    ```
    Date startDate = new Date();
@@ -113,9 +113,9 @@ Use [DateTimeFormat](../reference/apis/js-apis-intl.md) APIs to format the date
    ```
 
 
-## Number Formatting
+## Formatting Numbers
 
-Use [NumberFormat](../reference/apis/js-apis-intl.md) APIs to format a number for a specific locale.
+Use [NumberFormat](../reference/apis/js-apis-intl.md) APIs to format numbers for a specific locale.
 
 
 ### Available APIs
@@ -161,7 +161,7 @@ Use [NumberFormat](../reference/apis/js-apis-intl.md) APIs to format a number fo
    ```
 
 
-## String Sorting
+## Sorting Strings
 
 Use [Collator](../reference/apis/js-apis-intl.md) APIs to sort strings based on a specific locale. Users in different regions have different preferences for string sorting.
 
@@ -248,7 +248,7 @@ Use [PluralRules](../reference/apis/js-apis-intl.md) APIs to determine the singu
    ```
 
 
-## Formatting Relative Time
+## Formatting the Relative Time
 
 Use [RelativeTimeFormat](../reference/apis/js-apis-intl.md) APIs to format the relative time for a specific locale.