Update language-support.md

Author: sally-baolian

articles/cognitive-services/Speech-Service/language-support.md

@@ -56,9 +56,9 @@ Additional remarks for Text to speech locales are included in the [Voice styles
 
 ### Voice styles and roles
 
-In some cases, you can adjust the speaking style to express different emotions like cheerfulness, empathy, and calm. You can optimize the voice for different scenarios like customer service, newscast, and voice assistant. With roles, the same voice can act as a different age and gender.
+In some cases, you can adjust the speaking style to express different emotions like cheerfulness, empathy, and calm. All prebuilt voices with speaking styles and multi-style custom voices support style degree adjustment. You can optimize the voice for different scenarios like customer service, newscast, and voice assistant. With roles, the same voice can act as a different age and gender.
 
-To learn how you can configure and adjust neural voice styles and roles, see [Speech Synthesis Markup Language](speech-synthesis-markup-voice.md#speaking-styles-and-roles).
+To learn how you can configure and adjust neural voice styles and roles, see [Speech Synthesis Markup Language](speech-synthesis-markup-voice.md#speaking-styles-and-roles). 
 
 Use the following table to determine supported styles and roles for each neural voice.
 
@@ -80,7 +80,7 @@ Please note that the following neural voices are retired.
 
 ### Custom Neural Voice
 
-Custom Neural Voice lets you create synthetic voices that are rich in speaking styles. You can create a unique brand voice in multiple languages and styles by using a small set of recording data. There are two Custom Neural Voice (CNV) project types: CNV Pro and CNV Lite (preview). 
+Custom Neural Voice lets you create synthetic voices that are rich in speaking styles. You can create a unique brand voice in multiple languages and styles by using a small set of recording data. Multi-style custom neural voices support style degree adjustment. There are two Custom Neural Voice (CNV) project types: CNV Pro and CNV Lite (preview). 
 
 Select the right locale that matches your training data to train a custom neural voice model. For example, if the recording data is spoken in English with a British accent, select `en-GB`.