a chicken and egg situation字面意思：鸡和蛋的情况，实际意义：孰先孰后、孰因孰果的问题。

【例句】
You need experience to get a job, but you need a job to get experience. It's a chicken and egg situation.
你需要有工作经验才能找到工作，但你需要先工作才能有工作经验。这就是一个先有鸡还是先有蛋、孰先孰后的问题呀。

Did the company falter because our biggest clients left, or did our clients leave because they could sense instability within our company? For the time being, it's something of a chicken and egg situation.
我们公司是因为大客户离开而衰落，还是大客户因为我们公司内部运营不稳定而离开？目前来看，这是一个孰因孰果的问题。