puzzle over sth
to try to solve a problem or understand a situation by thinking carefully
about it
试图通过仔细思考来解决问题或了解情况;为…绞尽脑汁，苦思冥想
Scientists are puzzling over the results of the research on the drug.
科学家们在仔细思考这种药的研究结果。
You needn't puzzle over every single word or phrase in the book.
这本书用不着一字一句地抠。
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