To study diligently and assiduously under difficult conditions, often referring to overcoming poverty or lack of resources to pursue knowledge.
他自小家境贫寒，却映雪囊萤，最终考入了理想的大学。
Despite his humble family background since childhood, he persevered in his studies like 'reflecting snow and bagging fireflies', eventually gaining admission to his dream university.
Era:
Ancient
Frequency:
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