第18行从堆栈中弹出数据并执行之。

Line 18 pops the chunk from the stack and executes it.

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针对未来版本复制并执行自动化测试案例，可使之避免类似问题。

Replication and execution of the automated test cases against future releases keep them immune from similar issues.

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DB - aware对象知道从哪里怎样连接，怎样建立一个SQL语句并使之执行，以及怎样获得结果数据并存储到该分析对象中。

The DB-aware object knows how and where to connect, how to build a SQL statement and get it executed, and how to take the result data and store it into the analysis object.

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