JCA resource adapters are hosted by application servers that control their life cycle through a set of Service Provider Interfaces (SPI) defined by JCA specifications as System Contracts.

JCA资源适配器由应用服务器承载，这些应用服务器通过JCA规范作为系统协议定义的一组Service Provider Interfaces (SPI)来控制资源适配器的生命周期。

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The design specifications and design standards of graded broken stone which are based on vibration molding are proposed, and their feasibility is verified through practical project.

提出了基于振动成型的级配碎石设计指标及设计标准，并应用实体工程进行验证。

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Placing a picture of the Google Nexus 7 alongside the iPad mini, he went through their specifications - the iPad's screen size was not so mini, 30% bigger than the Nexus, the overall experience on one was "great", on the other "not so great".

BBC: Tablets take centre stage