[hotfix] [docs] Refine Chinese translation for page /zh/dev/table/dat…

[hayden520]

Key Purpose of This PR

This pull request focuses on optimizing Chinese expressions in the /zh/dev/table/concepts/overview.md document. The goal is to make the translation more natural, precise, and aligned with Flink’s technical context for Chinese-speaking users.

Detailed Changes (With Code Diff References)

docs/content.zh/docs/dev/table/data_stream_api.md (conversion section)
docs/content.zh/docs/dev/table/concepts/overview.md (conversion section)

1. Clarity Enhancements for Core Concepts

   • Original (Line 31):
     这意味着 Table API & SQL 在无论有限的批式输入还是无限的流式输入下，都具有相同的语义。
   • Optimized:
     这意味着，无论输入数据是有界的批处理输入还是无界的流处理输入，Table API 与 SQL 查询都具有相同的语义。
   • Why: Added explicit phrasing like 有界的批处理输入 / 无界的流处理输入 to clarify technical concepts, reducing ambiguity.

2. Precision for Stateful Operations

   • Original (Line 61):
     包含诸如[连接]({{< ref "docs/dev/table/sql/queries/joins" >}})、[聚合]({{< ref "docs/dev/table/sql/queries/group-agg" >}})或[去重]({{< ref "docs/dev/table/sql/queries/deduplication" >}}) 等操作的语句需要在 Flink 抽象的容错存储内保存中间结果。
   • Optimized:
     查询中若包含诸如[连接]({{< ref "docs/dev/table/sql/queries/joins" >}})、[聚合]({{< ref "docs/dev/table/sql/queries/group-agg" >}})或[去重]({{< ref "docs/dev/table/sql/queries/deduplication" >}})等有状态操作，就需要将中间结果存储在具备容错能力的存储系统中 —— 而 Flink 的状态抽象机制，正是用于实现这一需求的核心组件。
   • Why: Replaced 语句 with 有状态操作 to align with Flink’s technical terminology; added —— 而 Flink 的状态抽象机制... to clarify the relationship between concepts, improving logical flow.

3. Natural Language for Examples

   • Original (Line 67):
     另一个计算词频的例子如下
   • Optimized:
     再举一个例子，比如下面这个计算单词计数（word count）的查询。
   • Why: Used 再举一个例子，比如... to make the transition more conversational, matching how Chinese technical documentation is typically written.

Validation & Testing

Since these are documentation-only changes, no code tests (mvn clean verify) are required. The changes were validated by:

• Cross-checking with the original English documentation to ensure semantic consistency.
• Reviewing the revised text for naturalness in a Chinese technical context (e.g., confirming terms like 有状态操作 align with Flink’s community standards).

Scope

This PR addresses only the translation refinement of /zh/dev/table/concepts/overview.md. No unrelated changes (e.g., code modifications, other documentation pages) are included, ensuring focus for reviewers.

Thank you for making Flink’s Chinese documentation clearer and more accessible! 🚀

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CI report:

• e7881b3 Azure: SUCCESS

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