By following the Open Closed Principle with the order processing rules, I've made it much easier to add new types of order handling logic to the system.

通过在订单处理规则上遵循开闭原则，我使得在系统中添加新类型的订单处理逻辑容易得多。

youdao

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

The system can be an open system, or it can be a closed system, or it can be isolated.

系统可以是开系，可以是闭系，或是孤立系。

youdao

The system can be an open system, or it can be a closed system, or it can be isolated.

系统可以是开系，可以是闭系，或是孤立系。

麻省理工公开课 - 热力学与动力学课程节选

Without such restrictions, many consumer advocates say the Internet will change from being an open, democratic network to a closed system, as NPR's Laura Sydell reports.

NPR: Congress Votes Against Internet Neutrality Bill

Though Symbian's certainly not getting as much share of the mobile discussion these days as some of its smaller competitors, it's certainly important to keep in mind that these guys have software deployed on literally hundreds of millions of devices, making this perhaps the largest-scale conversion of a closed operating system to open source in history.

ENGADGET: Symbian Foundation talks about its move to open source

While Apple is a closed system, Google is open.

FORBES: Steve Jobs resigns, Google even more Googlishious