To study diligently and assiduously, often in difficult conditions; to persevere in one's studies despite adversity.
这位年轻的科学家在求学时期，曾有过雪窗萤火的经历，最终才在科研领域取得突破。
During his student days, this young scientist experienced the diligent study of "snow window, firefly light," eventually achieving breakthroughs in scientific research.
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