盤根究底窮根究底；尋根究底pán gēn jiū dǐask about everything in great detail;dig out the bottom truth (/cause); get down to the bedrock;get to the bottom (/root) of things (/the matter);inquire (/probe) deeply into sth; try to get to the heart of a matter
? 如今桃葉自己挑中了一個(gè)人，媽媽四出訪問，～打聽了兩個(gè)多月，覺得女兒的眼頭確實(shí)不錯(cuò)，這才點(diǎn)了頭。(王汶石《風(fēng)雪之夜》165) Now Taoye had found herself a young man and Ma spent two months asking people all about him. She was finally satisfied with her daughter's choice and gave her approval. 盤根究底底（柢）pán ɡēn jiū dǐ盤：盤問；究：追究。追究事情的根由和底細(xì)。get the bottom of the affair, get to the heart of a matter, close questioning |