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。
Your app should remove files from this directory as soon as it is done with them. The system may also purge lingering files from this directory at system startup.
当文件不再需要时，应当从这个文件夹中移除。系统启动时，可能会清理这个文件夹中的剩余文件。
Your app should remove files from this directory as soon as it is done with them. The system may also purge lingering files from this directory at system startup.
当文件不再需要时，应当从这个文件夹中移除。系统启动时，可能会清理这个文件夹中的剩余文件。
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