最終更新日：2024/06/27
showing unyielding diligence in one's studies; wearing a hole through one's metal inkstone from constant studying
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磨穿鉄硯
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磨穿鉄硯
noun
showing unyielding diligence in one's studies; wearing a hole through one's metal inkstone from constant studying
意味（1）
showing unyielding diligence in one's studies; wearing a hole through one's metal inkstone from constant studying
