ar.ca.num
n.（名词）【复数】 ar.ca.na[-n…] 或 ar.ca.nums A deep secret; a mystery.奥秘；神秘事物Often arcana Specialized knowledge or detail that is mysterious to the average person: 常作 arcana 难懂的，艰深的知识：对普通人来说难懂的特殊知识或细节：例句：.knows the arcana of police procedure and the intricacies of litigation.(George F. Will).了解警方程序及诉讼复杂性的专门知识.(乔治F.威尔)
A secret essence or remedy; an elixir.秘方：秘密的精髓或治疗法；万灵药
来源：Latin [from neuter of] arc3nus [secret] * see arcane 拉丁语 [] 源自arc3nus的中性词 [秘密] *参见 arcane
