他刻苦钻研的精神，值得效法。
为了很好地为祖国服务，他刻苦钻研。
我们要刻苦钻研经济工作。
有的问题可以通过自己的刻苦钻研加以解决。
他们不单是热爱，而且愿意刻苦钻研去获得它。
They not only loved knowledge but they were willing to work hard to attain2 it.
她说她一定要刻苦钻研美国文学以应付明年的考试。
She said that she would dig at American literature for her exam next year.
经过我的刻苦钻研和学习，我已经把这个课题做完了。
I completed this subject paper with diligent research and study.
毕业后，一边教学，一边刻苦钻研古文，研究文字声韵。
After graduation, while teaching, study hard while writing, research writing Phonology.
毕业后，一边教学，一边刻苦钻研古文，研究文字声韵。
After graduation, while teaching, study hard while writing, research writing Phonology.
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