ground rules
noun [ plural ] uk/ˈɡraʊnd ˌruːlz/ us/ˈɡraʊnd ˌruːlz/
基本原则，基本准则
the principles on which future behaviour is based
In all relationships a few ground rules have to be established. 要保持任何一种关系，都必须确立一些基本原则。
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。