A system or collection of rules or regulations on any subject. In extended use: any (unwritten) set of principles, conventions, or expectations…
In extended use: the accepted or established code of behaviour in any group, organization, or situation; an instance of this.
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。