the holy grail
圣杯，也就是追求的目标或最高要素
正式·比喻终极目标
英文释义
the ultimate goal or prize that is highly sought after or coveted
例句
Finding a cure for cancer is the holy grail of medical research.
典故来源
源自亚瑟王传说中耶稣最后晚餐使用的圣杯，象征终极追求目标。