be not on idiom UK
(表示不能接受、不应该发生)不行,行不通
Something that is not on is unacceptable and should not happen.
You can't be expected to work for nothing - it's not on. 不会有人想让你白干的——那可没门儿。
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。