Purposeful availment for the third type is determined by the level of interactivity and its commercial nature.
第三种有意利用是由互动的程度和其商业性质决定的。
Comet-style Web applications can bring a whole new level of interactivity to the Web.
Comet风格的Web应用程序可以为Web带来全新的交互性。
From another perspective you can say it's a high-level programming language that happens to be implemented in a way that emphasizes interactivity.
而从另一个方面来看,你可以说它是一种高级的编程语言,它实现的方式正好让它非常注重可交互性。
应用推荐