there's no knowing/telling/saying idiom informal
无法预料
it is not possible to know what will happen
She's very unpredictable, so there's no knowing how she'll react to the news. 她很让人捉摸不透，所以说不准她对这一消息会作何反应。
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。