多歷年所duō lì nián suǒthrough many years
? 這位史學家收集資料，～，終于寫成了一部百萬余字的史學專著。This historian collected material through many years,and at last wrote a treatise on the science of history of more than a million words. 多歷年所duō lì nián suǒ年所：年數(shù)。經(jīng)歷的年數(shù)很多。比喻經(jīng)歷的時間很長。undergo a long time, through many years |