It provides access to some features that are not offered by the web service itself including multi-file-operations like renaming, deleting or copying multiple files or folders.
它提供了访问一些不被网络服务提供本身包括像重命名多个文件操作功能，删除或复制多个文件或文件夹。
2
Comfortable and convenient operation, assembly thermal overload protection device and multi-file electronic speed constant power switch ensure high motor efficiency and durability.
操作舒适方便，装配过载过热保护装置，多档电子调速恒功开关，保证马达的高效率和耐用性。
3
Using a single file is problematic, especially in a multi-user system because of issues of file locking and the performance problems associated with working with a single, large file.