as if enumerating one’s family valuables—very familiar with one’s subject;at home in; can speak (on a subject) with great familiarity
? 說(shuō)到韻律問(wèn)題時(shí)，他講得頭頭是道，～。When speaking of the question of rhyme scheme,he made a clear and logical analysis; he was very familiar with the subject as if he were enumerating his family valuables.
如數(shù)家珍
as if enumerating one’s family treasures; having sth at one’s fingertips; show thorough familiarity with a subject
如數(shù)家珍rú shǔ jiā zhēn
數(shù)：計(jì)算；家珍：指家里的珍寶。像數(shù)點(diǎn)自己家藏的珍寶一樣清楚。比喻對(duì)所說(shuō)的事情十分清楚明白。very familiar with one’s subject, show thorough familiarity with a subject, have sth. at one’s fingerends