When the transactional requirements of the application are not very complex, programmatic transaction demarcation can be cumbersome and error-prone.
当应用程序的事务需求并不非常复杂时，编程方式的事务划分可能非常繁琐和容易出错。
Though most of this material is not very complex, it can take some time to fully understand the way XML is used in various applications and the benefits it offers.
虽然这份材料的大部分并不十分复杂，但完全理解XML在各种应用程序中的用法和它所提供的优点还是要花一些时间。
Although the control that you have created is not very complex, you have seen much of the basic functionality that you can build into a user control.
尽管已经创建的控件不是很复杂，但您已经了解可以置入用户控件的许多基本功能。
Although the control that you have created is not very complex, you have seen much of the basic functionality that you can build into a user control.
尽管已经创建的控件不是很复杂，但您已经了解可以置入用户控件的许多基本功能。
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