spuru9 commented on code in PR #28494:
URL: https://github.com/apache/flink/pull/28494#discussion_r3445487216
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docs/content.zh/docs/dev/datastream/overview.md:
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@@ -213,7 +213,7 @@ Data Sources
{{< tabs "8104e62c-db79-40b0-8519-0063e9be791f" >}}
{{< tab "Java" >}}
-Source 是你的程序从中读取其输入的地方。你可以用
`StreamExecutionEnvironment.addSource(sourceFunction)` 将一个 source 关联到你的程序。Flink
自带了许多预先实现的 source functions，不过你仍然可以通过实现 `SourceFunction` 接口编写自定义的非并行
source，也可以通过实现 `ParallelSourceFunction` 接口或者继承 `RichParallelSourceFunction`
类编写自定义的并行 sources。
+Source 是你的程序从中读取其输入的地方。你可以用
`StreamExecutionEnvironment.addSource(sourceFunction)` 将一个 source 关联到你的程序。Flink
自带了许多预先实现的 source functions，不过你仍然可以通过实现 {{< gh_link
file="flink-runtime/src/main/java/org/apache/flink/streaming/api/functions/source/legacy/SourceFunction.java"
name="SourceFunction" >}} 接口编写自定义的非并行 source，也可以通过实现 `ParallelSourceFunction`
接口或者继承 `RichParallelSourceFunction` 类编写自定义的并行 sources。
Review Comment:
Why just SourceFunction? Not ParallelSourceFunction and
RichParallelSourceFunction falling in the same line.
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