User talk:2001:B011:A406:559:481C:DF4:C6BE:F492

這一個圖形,像是燃燒中的煤球,前段實驗報告算是失敗.2001:B011:A406:559:481C:DF4:C6BE:F492 (talk)李肖先 1/27,2020.