At the casino, he tried the martingale strategy but quickly lost all his chips.

martingale 源自法语，原指"马具中固定马头的皮带"，在数学概率论中演变为一种赌博策略。该策略要求每次输钱后加倍下注，理论上只要赢一次就能收回所有损失，但实际上存在资金耗尽的风险。