周亚夫细柳是中国古代文学作品《木兰诗》中的一句诗句。该句原文为“花容月貌争开颜，周亚夫细柳辞旧郎”，意思是形容木兰的容貌美丽如花，举止婉约如月，与周亚夫别离时如柳絮轻飘。该诗句的译文可以为“Her beauty rivals that of flowers and the moon, as Mulan says farewell to her former lover timidly as a floating willow.”。