the outside world idiom (also the world outside)
外界，外部世界
things that are common in normal life but are not part of your experience
After 20 years in prison, he had no idea about the outside world. 在被监禁了20年以后，他对外面的世界一无所知。
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。