《诗经·小雅·伐木》有“伐木丁丁”一句,“丁”字今多读如“争”音。《经典释文》作为一部重要的音义书,给其注音并以“丁”字做反切上字给它字注音。《经典释文》反切上字经系联及与《广韵》注音比较,展现出在陆氏的观念中“丁”字除有端母读音外,还存在知母读音的分化倾向。 “The Book of Songs Xiaoya Logging” has “Logging Tintin ” a sentence, “Ding ” more than words to read such as “Zheng ” sound. “Classic Interpretation” as an important sound and meaning book, to its phonetic and “Ding” word anti-cut the word to its phonetic. Compared with the “Guangyun” phonetic system, the “anti-sense” classic scriptures of the “classical interpretation” show that in the concept of Lu, there is a tendency of “Ding”