For example, you may bind only one relational database service (MySQL or PostgreSQL) to an application.

比如，你应该只给自己的应用绑定一个关系型数据库服务(MySQL或PostgreSQL)。

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When searching for a product or service online, do business only with those you recognize.

在你上网搜寻商品时，只从那些你认可的网站购买。

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You can sign up for service only when you need it.

你仅当需要时签约使用服务就行。

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Virgin Mobile USA's mobile Broadband2Go service provides the ultimate hookup for people who want internet access wherever they are and want the value and convenience of only paying for the service when you need it.

ENGADGET: Mobile data gets even more piecemeal with 24-hour offerings from Virgin Mobile

Tethering your iPhone is a great alternative to expensive hotel WiFi, un-secured and unreliable free hotspots, or signing a 2-year contract for mobile broadband service that you only need from time to time.

ENGADGET: Nexaria BC2 router supports iPhone tethering for some reason (video)

And I want to thank you not only for the support that you provide me, but also for the service that you perform to keep our country safe each and every day.

WHITEHOUSE: Energy Security and Independence