囊萤:晋代人车胤收集萤火虫读书;积雪:晋代人孙康映雪读书。形容刻苦攻读,勤学上进。
study by the light of reflected snow or glowworms
囊(náng nāng)
萤(yíng)
积(jī)
雪(xuě)