a chicken and egg situation
US /ə ˈtʃɪkɪn ænd ɛɡ ˌsɪtʃuˈeɪʃən/
UK /ə ˈtʃɪkɪn ænd ɛɡ ˌsɪtʃuˈeɪʃən/

1.
先有雞還是先有蛋的問題, 因果難辨的局面
a situation in which it is impossible to say which of two things caused the other
:
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It's a real chicken and egg situation: do people get stressed because they're busy, or are they busy because they're stressed?
這真是一個先有雞還是先有蛋的問題:人們是因為忙碌而感到壓力,還是因為壓力而忙碌?
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The problem of poverty and lack of education is often described as a chicken and egg situation.
貧困和教育缺乏的問題常被描述為先有雞還是先有蛋的情況。