I became aware of this problem when I recently taught a course in Web development.
在我最近讲Web开发的课程时，已经意识到了这个问题。
This, of course, contradicts all experience of the last 30 years, in which user experience's importance in system development has steadily increased as we moved from mainframes to PCs to the Web.
但是，在这三十多年来，我们已经明白使用者经验对系统开发的重要性日渐增加，并且我们也由大型系统为主变成以网际网路应用服务为主。
There are, of course, different approaches to mobile development: Web applications designed to work on mobile devices, RIAs aimed at that market, and applications that run directly on the devices.
当然，手机开发有很多不同的方法:针对手机设备的web应用程序开发，针对市场的RIAs，和直接在设备上运行的应用程序。
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