Android is a layered environment built upon a foundation of the Linux kernel, and it includes rich functions. The UI subsystem includes.
Android是一个分层的环境，构建在Linux内核的基础上，它包括丰富的功能。
Android is a layered environment built upon a foundation of the Linux kernel, and it includes rich functions. The UI subsystem includes.
Android是一个分层的环境，构建在Linux内核的基础上，它包括丰富的功能。
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