Updated component description (#2651)

### What problem does this PR solve?



### Type of change


- [x] Documentation Update

web/src/locales/en.ts

@@ -696,12 +696,12 @@ The above is the content you need to summarize.`,
       nameRequiredMsg: 'Name is required',
       nameRepeatedMsg: 'The name cannot be repeated',
       keywordExtract: 'Keyword',
-      keywordExtractDescription: `This component is used to extract keywords from user's question. Top N specifies the number of keywords you need to extract.`,
+      keywordExtractDescription: `A component that extracts keywords from a user query, with Top N specifing the number of keywords to extract.`,
       baidu: 'Baidu',
       baiduDescription: `This component is used to get search result from www.baidu.com. Typically, it performs as a supplement to knowledgebases. Top N specifies the number of search results you need to adapt.`,
       duckDuckGo: 'DuckDuckGo',
       duckDuckGoDescription:
-        'This component is used to get search result from www.duckduckgo.com. Typically, it performs as a supplement to knowledgebases. Top N specifies the number of search results you need to adapt.',
+        'A component that retrieves search results from duckduckgo.com, with TopN specifying the number of search results. It supplements existing knowledge bases.',
       channel: 'Channel',
       channelTip: `Perform text search or news search on the component's input`,
       text: 'Text',
@@ -966,7 +966,7 @@ The above is the content you need to summarize.`,
       },
       concentrator: 'Concentrator',
       concentratorDescription:
-        'This component can be used to connect multiple downstream components. It receives input from the upstream component and passes it to each downstream component.',
+        'A component that receives the output from the upstream component and passes it on as input to the downstream components.',
     },
     footer: {
       profile: 'All rights reserved @ React',