Хэлэлцүүлэг:Абтай хан

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Задлан ялгал хийж чадсангүй (Бололцоотой бол MathML （туршилт）: Invalid response ("Math extension cannot connect to Restbase.") from server "https://en.wikipedia.org/api/rest_v1/":): {\displaystyle \<span style = "writing-mode:vertical-lr";>ᠬᠤᠭᠠᠴᠠᠭ᠍ᠠ᠋</span>' = \frac{\Delta t}{\sqrt{1 - \frac{v^2}{c^2}}}}