先理解核心含义，再看它在真实句子里的用法。
先人之见
An idea that preoccupies the mind and holds the attention
His main preoccupation is finding a new job.
他主要的心事是找一份新工作。
She stared out the window in deep preoccupation.
她凝视着窗外，陷入深深的沉思。
Financial preoccupations often keep her awake at night.
财务上的烦心事常常让她夜不能寐。
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Dictionary facts from ECDICT, OCTANOVE.