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 .lnk files operate as Windows Explorer extensions, rather than file system extensions. As a shell extension, .lnk files cannot be used in place of the file except in Windows Explorer, and have other uses in Windows Explorer in addition to use as a shortcut to a local file (or GUID). These files also begin with L.