The two versions differ in internal details like the indexing system, optimizer, and storage engine.
这两个版本在内部细节上不同，如索引系统、优化器和存储引擎。
It cannot write copies of itself to the phone's internal storage, change system files, or remove itself from the app management interface.
它不能把自己复制到手机的内部储存空间中，也不能改变系统文件，或者把自己从应用程序管理界面中删除。
The NAS device uses an internal operating system，which acts as a control mechanism for managing data storage，semantics and control for reading and writing data onto its disks.
NAS设备采用一个内部操作系统，该操作系统起到了管理数据存储、语义和控制磁盘数据读写等控制作用。
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