lucubration

经过多年的刻苦钻研，她终于发表了关于量子力学的开创性论文。

After years of ___lucubration, she finally published a groundbreaking paper on quantum mechanics.

他每晚的刻苦钻研让他赢得了科学竞赛的冠军。

His nightly ___lucubration earned him the championship in the science competition.

这份报告凝结了数月刻苦钻研的成果。

This report is the fruit of months of intense ___lucubration.