lucubrate|lucubrated
为了完成论文，他经常熬夜苦读到凌晨。
He would often ___lucubrate until dawn to finish his thesis.
他在图书馆熬夜钻研，写出了这篇学术论文。
He ___lucubrated late into the night at the library to produce this academic paper.
这位学者在图书馆里潜心研究数月，终于完成了他的学术专著。
The scholar ___lucubrated in the library for months before completing his academic monograph.