not have two - to rub together have none or hardly any of the specified items, especially coins. informal
2011TechDirt I could go on but if you've got two brain cells to rub together you've got the point by now.
英语词组固定搭配大全包含15956条英汉双解词组,基本涵盖了全部常用英文词组、短语的翻译及用法,是英语学习的有利工具。