Model-driven approaches to software and system development have been in use for some time.

软件和系统开发的模型驱动方法已经使用了一段时间了。

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Designing an effective event-driven software system that can respond to real-time changes and events in a timely manner is a complex task.

设计能够对实时更改和事件作出及时响应的有效事件驱动软件系统是一项复杂工作。

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According to the function demands of north-finding system, software design builds multi-task software structure of north-finding system based on event driven mechanism in real time control system.

根据寻北系统的功能要求，软件设计采用实时控制系统事件驱动的程序设计方法构造了寻北系统的多任务软件结构。

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At the same time, greater emphasis on a demand-driven visa system would create new ways for workers to enter the U.S. who will be increasingly needed as baby boomers retire.

CNN: Immigration reform gets U.S. in on Mexico's boom