Cloud computing on distributed, commodity platforms - like Google app Engine and Amazon EC2 - is perhaps the most exciting new trend in Web 2.0 application development.
分布式商用平台上的云计算——比如Google App Engine和Amazon EC2——也许是Web 2.0应用开发中最让人兴奋的新趋势。
PaaS systems are generally hosted, web-based application-development platforms, providing end-to-end or, in some cases, partial environments for developing full programs online.
PaaS系统通常是宿主在基于web应用程序开发的平台上，提供端到端的开发环境，或者在某些情况下，提供在线开发全部程序的局部环境。
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