“炼丹术”用英语怎么说？

中世纪的炼丹术士企图把贱金属炼成金.Medieval alchemists attempted to transmute base metals into gold.占星学和炼丹术为神秘之学.Astrology and alchemy are occult sciences.炼丹术, 虽然是一种科学,科学与所有有法律,必须遵循.Alchemy, though, is a science and with all sciences the...