Hence the consumer can access the service on demand via a user interface or via an asynchronous process requiring a reliable messaging transport.

因而，消费者可以根据自己的需要来访问这些服务，如通过用户界面或需要可靠消息传输的异步流程。

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The solution is a proxy service that anticipates a variety of incoming requests and launches the appropriate service on demand for subsequent processing.

解决方案是使用代理服务，它预测到达的各种请求，根据后续处理的需要启动适当的服务。

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PaaS (platform as a service) is a combination of a development platform and solution stack delivered as a service on demand.

PaaS(平台即服务)是将开发平台和解决方案包合二为一的的立即响应式服务。

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The company is a hot San Francisco startup that already has 25 outposts around the world for its simple, seductive service: on-demand transportation.

WSJ: The Weekend Interview with Travis Kalanick: The Transportation Trustbuster

Google may be looking into enhancing its new Google TV product, a web-meets-TV service, or build out its own video-on-demand service.

FORBES: Google Buys Digital Video Company Widevine, Building Up Video On-Demand Service

September 30, 2004 - TiVo announces plans to team up with Netflix on a video-on-demand service.

ENGADGET: TiVo Deathwatch