The design follows the Open Closed Principle if you can extend the system by swapping out implementations of IDataSource without making any change to the BusinessProcess class.

如果你可以通过实现IDataSource对这个系统进行扩展并且不对BusinessProcess类做任何的修改，那么这个设计就遵循了开闭原则。

youdao

Setting up the support system for open class teaching management, including evaluation and motivation organism, feeding back channels, relevant technical support and regular evaluation.

第三，创建公开教学管理的保障机制，包括评价与激励机制，畅通的反馈渠道，相关的技术支撑和定期的效果评估。

youdao

Therefore, we need to learn from the cultural science Angle the open class teaching system, the material, as well as the teachers 'spiritual life in this research.

所以在公开课的研究中，我们需要从文化学的角度对公开课的制度、物质、以及教师的精神文化等各方面对其进行系统的阐述。

youdao

The Manhattan Virtual Classroom is a web-based course management system that includes a variety of discussion groups, live chat, areas for the teacher to post the syllabus and other handouts and notices, a module for organizing online assignments, a grades module, a surveys module, and a unique, web-based email system open only to students in the class.

UNESCO: Free and Open Source Software for E-learning

The game is also class-free, giving players a more open progression system which avoids those pre-game set-in-stone permanent decisions.

FORBES: Richard Garriott's 'Shroud Of The Avatar: Forsaken Virtues' Launches On Kickstarter