德沃金的法律解释理论以整体法律观为指导,追求符合维度(即解释应尽量与过去的司法实践史相一致,文中或简称“实践”)与实体维度(即对法律的解释还要符合道德、法律原则、政策等,文中或简称“原则”)动态的融贯性。国际习惯的两个构成要素国家实践和法律确信,则分别体现了描述性准确(符合维度)和规范性诉求(实体维度)的特征,国际习惯的解释理论也应把二者最佳地融贯起来,而不是以一维代替另一维,从而解决传统国际习惯形成理论的难题。这一理论对于解释伊拉克战争能否成为新的国际习惯的先例无疑具有工具意义。 Dworkin’s theory of legal interpretation is guided by the concept of the overall legal system, and the pursuit of conformity with dimensions (that is, explanations should be consistent with the past judicial practice history as much as possible in texts or abbreviations) and substantive dimensions (ie, interpretation of laws To comply with the principles of morality, law, policy, text or abbreviation “principle ”) dynamic coherence. The two components of international custom, the national practice and legal conviction, have the characteristics of descriptive accuracy (conformity with dimension) and normative appeal (substantive dimension) respectively. The theory of interpretation of international custom should also best cohere with the two Instead of substituting one dimension for another dimension, the problem of forming a theory by traditional international custom can be solved. This theory is undoubtedly of instrumental significance for explaining the precedent of the Iraq war as a new international custom.