...件等等; (2)媒体层(Media Layer),主要提供媒体业务引擎,包括图像、音频、视频; (3)核心服务层(Core Services Layer),主要提供系统服务,包括网络和数据库访问、定位以及浏览器引擎等..
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the Core Services layer 核心服务层
As described in the previous sections, the Infrastructure and the Runtime layer provide core services for running SCA applications.
正如在前面的几个部分中所述,基础结构和运行时层提供了用于运行sca应用程序的核心服务。
And putting entities' behavior in services or the view layer scatters the entities' core logic throughout the application, causing maintenance problems.
另外,把实体的行为放在服务或视图层中,会导致实体的核心逻辑分散在应用程序中的许多地方,导致维护问题。
The core OS, core services, media layer, and Cocoa — to build the iPhone OS we took the bottom three layers to form the iPhone OS.
核心OS、核心服务、多媒体层以及Cocoa。
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