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.
Learn how to find Explorer.exe. Windows is a mystery to many users. While it's technically an operating system, what that means is that it's a layer of software that sits on top of your hardware and lets you run programs written for it. The Explorer program is what lets you navigate through the various folders and files on your system's hard drive. Oftentimes, viruses or Trojans will disguise themselves as explorer.exe (the Explorer executable file), so it's important to understand where the real one is. Turn on your computer and log in.