a chicken-and-egg problem an unresolved question as to which of two things caused the other.
☞ This expression comes from the traditional riddle: 'which came first, the chicken or the egg?'
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。