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.
Computer files with an .exe extension are called executables, or EXE files. This type of file is one of the most ubiquitous in the Windows operating system, where it is used to install or run software applications. If the EXE file was downloaded from the internet, you'll be asked to confirm that you want to run it. 2  Be wary when running EXE files from unknown sources, as this is the easiest way to get infected with a virus. 3  Never open an EXE file downloaded as an email attachment, even if you know the sender.