User talk:100.40.193.207

October 2020
Hello, I'm Materialscientist. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Kepler's laws of planetary motion—because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help desk. Thanks. Materialscientist (talk) 13:22, 22 October 2020 (UTC)
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May 2021
Hello, I'm Bsoyka. I wanted to let you know that I reverted one of your recent contributions—specifically this edit to Deng Yang—because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help desk. Thanks.  Bsoyka  ( talk &middot;  contribs ) 16:27, 18 May 2021 (UTC)