To diligently proofread or annotate books, often with a red pen, implying meticulous scholarly work.
老教授几十年如一日，伏案滴露研朱，为学术研究贡献了毕生精力。
The old professor, for decades, worked diligently at his desk, proofreading and annotating, dedicating his entire life to academic research.
Era:
Ancient
Frequency:
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