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。
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。