User talk:2601:2C3:4201:D70:0:0:0:6AA3

October 2021
Hello, I'm DVdm. An edit that you recently made to Doppler effect seemed to be a test and has been reverted. If you want to practice editing, please use the sandbox. If you think a mistake was made, or if you have any questions, you can leave me a message on my talk page.   DVdm (talk) 08:33, 18 October 2021 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did at Frame of reference. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges.   DVdm (talk) 21:44, 18 October 2021 (UTC)

Please stop making test edits to Wikipedia, as you did to Doppler effect. It is considered vandalism, which, under Wikipedia policy, can lead to being blocked from editing. If you would like to experiment again, please use the sandbox.   DVdm (talk) 21:44, 18 October 2021 (UTC)