现在，处于 try 错误处理语句中，继续从 Excel 工作簿收集信息，我们先从它的工作表开始。

Now, staying within the try error handling statement, proceed to gather information from the Excel workbook, starting with its sheets.

youdao

在DataAccess子系统内部实际上已经有了很多东西：SQL语句生成，错误处理，结果集管理，等等。

There is really a lot going on inside the DataAccess subsystem: generation of SQL statements, error handling, result set management, etc.

youdao

乐观事务锁不能用于在单个update语句中更新数据行集合，因此在这种情况下，很难进行错误处理。

Optimistic transaction locking should not be used to update sets of rows in a single update statement, as error handling in this case is very difficult.

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