可以直接在外部的内存设备(SD卡)上安装应用，还可以将应用从内部迁移到SD卡上，反之亦然。
Apps can be installed directly on an external memory device (SD card). They can also be move from internal memory to the SD card and back.
文件系统是你安装的Linux内核的一部分，他负责对包括外部设备上的文件的读写。
The filesystem is the part of your Linux installation responsible for reading and writing files, including those on external devices.
在绑扎钢筋笼的同时，托架和推进工作车将通过设备本身来完成转运和安装。不须借助任何外部设备。
Before concreting, during the construction of the re-bar cage, the brackets and launching wagons will be repositioned by the machine itself, without any need of external equipment.
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