OOAD gives us classes and objects on the application level, while BPM has event-driven process models.
OOAD为我们提供了应用程序层上的类和对象，而BPM具有事件驱动的流程模型。
GWT also does a good job of abstracting away some of the low-level aspects of Ajax application development, such as cross-browser incompatibilities, the DOM event model, and making Ajax calls.
对于将Ajax应用程序开发的一些低层方面(如跨浏览器的不兼容、DOM事件模型和进行Ajax调用)抽象出来，GWT做得很好。
GWT also does a good job of abstracting away some of the low-level aspects of Ajax application development, such as cross-browser incompatibilities, the DOM event model, and making Ajax calls.
对于将Ajax应用程序开发的一些低层方面(如跨浏览器的不兼容、DOM事件模型和进行Ajax调用)抽象出来，GWT做得很好。
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