这支持数据选择方法从过程序编程转向声明式编程的大趋势，可以降低IT开发和维护的总费用。
This supports the general trend toward data selection over procedural programming to lower overall IT development and maintenance costs.
Amazon EC2允许拥有信用卡的任何人按小时支付服务器费用，通过一个应用程序编程接口(API)来打开和关闭服务器。
Amazon EC2 lets anyone with a credit card pay for servers by the hour, turning them on and off through an application programming interface (API).
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