There are also cliffs, mounds, ancient and quite dead volcanoes, even mountain chains!

月球上还有悬崖、丘陵、古老的死火山，甚至还有山脉链！

You are atop the remnants of an ancient volcano.

你在一座古老火山的遗迹之上。

As Dr Blundy points out, " pretty much all of the non-ferrous natural resources that we exploit come ultimately from ancient volcanoes."

正如布伦迪博士指出的那样，“几乎所有人类开发的有色自然资源最终都来自古代火山。”