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。
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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