他下苦功思考这一新观点，经过长时间的艰苦工作，写了一篇论文，对此进行阐述。

He fell upon the new idea and after a long time of hard work wrote an important paper on it.

youdao

他下苦功思考这一新观点，经过长时间的艰苦工作，写了一篇论文，对此进行阐述。

He fell upon the new idea and after a long time of hard work wrote an important paper on it.

youdao