“贰”是个相当复杂的交叉词,无论是义项的切分、词义的概活,还是词义发展的脉络,都还有些值得进一步探讨的问题。文章探讨了“贰”的词义系统,“贰”词义的发展,通过“贰”与“二”、“、”字的比较,阐明“贰”的词义系统,进而讨论有关《左传》中“贰于X”的释义问题。 “II ” is a rather complicated crossword, and there are still some problems which are worth discussing further, whether it is the division of meaning, the generalization of meaning, or the development of meaning. The article explores the meaning system of “II ” and the development of the meaning of “II ” by the comparison between the characters “” and “ Semantic system, and then discuss the ”Zuo Zhuan“ in the ”II on the X" interpretation of the problem.