Update README.md

v0.0.2版本发布

README.md

@@ -6,12 +6,16 @@ Download `SwitchDNS_Setup.msi` and `setup.exe`. Then double click the setup.exe.
 
 ## usage
 
-When you run this application, it will automaticlly flush DNS and test the average time interval between send DNS query and receive DNS response and successful receive rate.
+When you run this application, it will automaticlly scan your adapters and keep that which use IPv4 DNS server.
 
-Then it will print DNS address, average time interval and successful rate sort by successful rate firstly and average time interval secondly.
+It can scan your adapters using IPv4 DNS server and help to select better IPv4 DNS server.
 
-After thar it will scan your adapters which uses IPv4 DNS servers and print them, and then ask you to change them DNS servers.
+When you enter `adapters`, it will print your adapters' names, descriptions and IPv4 DNS server address at last scan. You can enter `rescan` to re-scan your adapters.
 
-It will print "How mush DNS servers would you wants to set?" to ask you the numbers of DNS servers you wants to set. For example, if you want set the two DNS server with the highest success rate and the fastest response speed, you can press `2`.
+When you enter `setDNS`, it will test the average time interval between send DNS query and receive DNS response and successful receive rate. Then it will print DNS address, average time interval and successful rate sort by successful rate firstly and average time interval secondly. Then you can enter the name of your adapters to select better DNS server address for them.
 
-When it have done its works, it will print "Operations done.", then you can press any key to leave.
+You can enter `modifyWEB` to view and modify the websites used to test DNS servers and enter `modifyDNS` to view and modify the DNS servers address for choice.
+
+Enter `exit` to exit.
+
+This application can be used in Windows system only.