A man's knees are worth gold; a man should not easily humble himself or bow down to others, emphasizing dignity and self-respect.
他虽然家境贫寒，却始终牢记“男儿膝下有黄金”的道理，从不向困难低头。
Although he came from a poor family, he always remembered the saying 'a man's knees are worth gold' and never bowed to difficulties.
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