Хэлэлцүүлэг:Абтай хан
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}}}}