公文包可提携的，通常扁平带把手的包，用来装文件或书。

A portable, often flat case with a handle, used for carrying papers or books.

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该更新框架提供了存储、备份以及安装工具，通过移植工具包可完成对这些工具的配置工作。

The update framework provides storage, backup and installation facilities that are configurable from the porting kit.

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机器—或平台—仿真可以以几种方式实现，其中有一种流行的开源包可支持许多hypervisor，被称作QEMU。

Machine - or platform - emulation can be performed in a number of ways, but a popular open source package that supports a number of hypervisors is called QEMU.

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