拼音：jiàn lǎo wú máng，rén lǎo wú gāng
注音：ㄐㄧㄢˋㄌㄠˇㄨˊㄌㄠˇㄨˊㄍㄤ
解释：芒：锋芒。剑用久了就会失去锋芒，人衰老之时也失去刚性。
出处：明·冯梦龙《东周列国志》第三十二回：“桓公虽然是个英主，却不道剑老无芒，人老无刚。”
Awn: sharp. The sword will lose its edge after being used for a long time, and people will lose their rigidity when they grow old.
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