追溯trace back to;date from;date back to;be retroactive
我们两国人民之间的友谊可以～到第五世纪。The friendship betwee our two peoples dates from (or back to)the 5th century./这个传说可以～到遥远的过去。The legend goes(or can be traced) back to remote antiquity./这种做法可以～到更早时候。This method can be traced back to still earlier times./可～的retraceable/～法retrospective (or retroactive)law/～力 retroactive force;retroactivity(e.g.承认的～力retroactivity of recognition)/～解释retroactive interpretation /～适用retroactive application/～效力retroactive effect/～性retroactivity |