Most Mandarin varieties have four tones. The final stops of Middle Chinese have disappeared in most of these varieties, but some have merged them as a final glottal stop. Many Mandarin varieties, including the Beijing dialect, retain retroflex initial consonants, which have been lost in southern dialect groups.
explorer.exe is a system process that is needed for your PC to work properly. It should not be removed. Check your system now to identify unused processes that are slowing down your computer. The explorer.exe file is an executable file for Windows Explorer.
Microsoft Windows Explorer. Microsoft Windows Explorer is a graphical file management utility for the Windows operating sytem (OS). Windows Explorer, which was introduced with Windows 95, was later renamed File Explorer. Each time that a computer user accesses a disk or opens a folder containing files, they are using the Windows/File Explorer utility. The goal of the file management utility is to allow users to conveniently work with the files and directories located on any connected disk.