premineWiktionary 原文构词拆分pre-前缀Before; physically in front of. · Before; earlier in time; beforehand.+mine词根/词干词源说明From pre- + mine.释义（英文）动词 Verb(transitive) To mine (units of a cryptocurrency) in advance of that currency being made available to the public.名词 NounAn instance of premining.