MUCT is very similar in nature to how universal coordinated time or UTC works on earth.

火星协调通用时间在本质上与世界协调时间（UTC）在地球上的计算方式非常相似。

Much like how earth has a prime meridian marking for which universal coordinated time is based off of, Mars has a meridian that was first proposed way back in 1830 to be exact and is marked by a crater known as Airy-0.

就像地球上用来标记世界协调时间的本初子午线一样，火星上的子午线最早是在 1830 年提出的，精确地说，火星上有一个被称为 Air-0 的陨石坑。