in the dark
not informed about things that might be useful to know:
Our boss tends to keep us in the dark most of the time.
“Do you know anything?” “No, I'm completely in the dark, like everyone else.”
英语词典包含110679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。