When two parties are locked in a dispute, a third party often benefits from their conflict; a dispute between two rivals benefits a third party.
两家公司为了争夺市场份额，互相压低价格，结果导致两败俱伤，反而让新进入的竞争者渔翁得利，真是鹬蚌相危
The two companies, vying for market share, mutually lowered their prices, resulting in both suffering losses. This allowed the newly entered competitor to profit, truly a case of the snipe and clam in peril.
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